ECE Mnemonics 2017.pdf

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Compilation of ECE Mnemonics

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Looking for ECE/ IT-related job with competitive salary? Kindly send your resume to me via [email protected].

a compilation of mnemonics for

Electronics Engineering (ECE)

by

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Chapter I. Mathematics……….1

Constant………...1

Conversion………...……….3

Arithmetic………5

Algebra………..8

Trigonometry………..13

Geometry………17

Calculus………...17

Differential Equation………..…….……….18

Probability and Statistics……….……18

Chapter II. Electronics………..……….….……….….……….….……….…..19

Electricity and Magnetism……….19

DC/AC Circuits……….….…….20

Energy Conversion……….…….22

Semiconductor Theory……….………...23

Electronic Devices Fundamentals……….…….………..23

Computer Principles……….…….………...26

Chapter III. General Engineering & Applied Sciences……….….……….……..………29

General and Inorganic Chemistry……….………….………..29

Organic Chemistry……….……….39

Physics……….………...42

Thermodynamics……….………42

Strength of Materials……….………..44

Engineering Economy……….……….46

Engineering Management………..……….…………47

ECE Laws……….……….………...48

Contracts and Obligation………...……….….………48

General Knowledge………...…………..………51

Chapter IV. Electronic Systems & Technologies……….….….……….……..62

Principles of Communication……….………..………62

Modulation……….…………..……63

Radio Receiver and Noise……….……….…….63

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Microwave Communication……….………..65

Telephony……….……….……….66

Fiber optics……….………67

Data Communication……….……….…………68

Broadcast and Acoustic……….……….…..72

Transmission Lines……….……….….…73

Wave Propagation and Antenna……….……….……..74

Navigational Aids and Radar……….….…...75

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Compilation of ECE Mnemonics

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MATH Constant

Mnemonic device

May I have a large container of coffee?

Explanation

Counting the letters of each word gives you the value of pi to 7 places. Mnemonic device

How i need a drink, alcoholic of course, after the heavy chapters involving geodesy

Explanation

The lengths of the words constitute the number of pi; 3,14... Mnemonic device

Sir, I know a rhyme excelling in mystic force and magic spelling. Celestial spirits elucidate, all my own striving can't relate

Explanation

How I want a drink, alcoholic of course, after the heavy lectures involving quantum mechanics!

Explanation

"May I have a large container of coffee? Thank you!"

Explanation

The polite version of the pi (3.141592654...) mnemonic, giving two extra digits. Number of letters in each ord is the corresponding digit in pi.

Sentences to remember Pi

3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986 280348253421170679...

Count the characters in the words:

How I want a drink, alcoholic of course, after the heavy lectures involving quantum mechanics. All of thy geometry, HerrPlanck, is fairly hard...:

3.14159265358979323846264...

More examples:

1. I took a quick glimpsing at bright stars far north. (3.)1415926535

2. I made a glass alligator...(3.)14159

3. "Can I have a Pepsi? Carbonate it please. Right now!" 3.141592653 by Jake

4. Now I took a drink carefully as Shelly sings. 3.14159265

5. Tom, I need a drink. Powerades do things. Tomas -- you fetch Powerade.3.14159265358

6. And I love a giant continent on waters large and great. Computer Megastore Quality Hamburger Set is now everyday sold inside my hotrod. 3.1415926535897932384626

7. I hope I dance beautiful in eleven years for mommy. (3.)1415926535

8. I love a seven backboned TV. Shrews which ate seven gorillas fabricate dresses.(3.)1415926535897

9. I want a mouse notifying me eleven times for three weekends. (3.)14159265358

10. For a time I stood screaming at George while Ann cried. 3.1415926535

11. I want a pizza, yesterday we wanted pizza, Yes-- pizza! (3.)1415926535

12. Yes, I like a flute. Classical is lovely music. The music revolves immensely through knowledge. 3.14159265358979

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14. Can I tell a story regarding my family lives and views? 3.1415926535

15. And I Love a Pizza. Yesterday my sister drank,ate 3.141592653

16. I can't.I hadn't memorized pi digits since the work's terribly difficult.(3.)141592653589

Mnemonic device

We require a mnemonic to remember e whenever we scribble math To express e, remember to memorize a sentence to simplify this

Explanation

The lengths of the words constitute the number 2.7182818284 e (the base for natural logarithms)

Constant e = 2.718281828459045

 United States President Andrew Jackson served 2 terms in office. He was the 7th president and was elected in1828.

 Split up E by groups. 2.7 is easy to remember. Then, 1828 — twice. Finally, a 45-90-45 triangle. Thus e is 2.7 1828 1828 45-90-45

 e = 2.7182818284: Count the characters in the words:

To express e, remember to memorize a sentence to simplify this

or

We require a mnemonic to remember e whenever we scribble math What is the Speed of Light?

The sentence

We guarantee certainty, clearly referring to this light mnemonic .

represents the speed of light in meters per second through the number of letters in each word: 299792458 m/s

Conversion

Mnemonic device

To convert from a Larger metric unit to a Smaller metric unit, think of alphabetical order. You would move from the letter L to the right to get to the letter S.You would move to the left from the S in "smaller" to get to the letter L in "larger."

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To convert from a LARGER to a SMALLER metric unit - move the decimal to the Right as many places as indicated by the # of zeros in the ten's power.To convert from a SMALLER to a LARGER metric unit - move the decimal to the Left as many places as indicated by the # of zeros in the ten's power.

Mnemonic device

King Hector Died Mysteriously Drink Chocolate Milk.

Explanation

Metric system... first letter in each words matches the metric system Greatest to least. ex. Kilo, Hecto, Deka, Meter, Dec, CM, MM

Mnemonic device

Kids Hate Doing Math During Cloudy Mondays Km Hm Dam M Dm Cm Mm

Explanation

Kilometer Hectometer Dekameter Meter Decimeter Centimeter Millimeter also helps when converting (ex.meters to millimetres) just count how many spaces from meters to millimeters to find out where to place decimal.

Mnemonic device

Good Models know how Dunkin donuts can make U not petit

Explanation

giga, mega, kilo, hecto, deca, deci, centi, milli, micro (symbol looks like a U), nano, pico Mnemonic device

King Henry Died While Drinking Chocolate Milk.

Explanation

This mnemonic device will help with the metric system prefixes. Kilo, Hecto, Deka,whole, deci, Centi, Milli Mnemonic device

King Henry died bloated drinking chocolate milk.

Explanation

These stand for the Metric prefixes and base unit. Kilo, Hecto, Deca, base, Deci, Centi, Milli Mnemonic device

King Henry Danced Merrily Down Center Main Meeting Nice People

Explanation

The Metric Prefixes:Kilo, Hecto, Deca, METER, Deci, Centi, Milli, Micro, Nano, Pico Mnemonic device

Kangaroos Hop Down Mountians Drinking Chocolate Milk

Explanation

Kilo-Hecto-Deka-(M-L-G)-Deci-Centi_Milli Mnemonic device

Kings hate dragons because dragons can't make money.

Explanation

Metric system prefixes (kilo, hecto, deca, base, deci, centi, milli, micro) Mnemonic device

Kittens Hate Dogs But Do Chase Mice

Explanation

Kilo- Hecto- Deca-Base(meter)-Deci- Centi- Milli Mnemonic device

Great mighty king henry died by drinking chunky milk

Explanation

Giga, mega, kilo, hecto, deka, BASE, deci, centi, milli, Mnemonic device

Kill Him Dead Or Don't Call Me

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Kilo Hecto Deco

(Meters, Liters, OR Grams) Deci

Centi Mili

This allows for all metric measurements, not just meters.

Metric System

King Henry Drinks Much Dark Chocolate Milk

The order of prefixes in the metric system, for every power of ten from 3 to -3, is Kilometre, Hectometre,Decametre, Metre, Decimetre, Centimetre, Millimetre:  King Hector's Daffy Mother Drinks Chocolate Milk

 King Henry's Daughter Makes Delicious Chocolate Muffins

 King Henry Died Monday Drinking Chocolate Milk

 King Henry Died! Mother Didn't Care Much

 King Hector Dector Makes Delicious Chocolate Milk

 Kangaroos Hop Down Mountains During Cold Months

 Kings Have Diamonds. Most Diamonds Cost Money.

 King Henry Died Monday During Christmas Mass.

This variant is for the prefixes Kilo-, Hecto-, Deca-, then the Base unit (such as metre, gram, litre), then the prefixesDeci-, Centi-, Milli-:

 Kings Have Diamonds But Diamonds Cost Money

The prefixes for powers of ten from 18 to -18 using increments of 3 are Exa- (18), Peta- (15), Tera- (12), Giga- (9), Mega- (6), Kilo- (3), unit (0), Milli- 3), Micro- 6), Nano- 9), Pico- 12), Femto- (-15), Atto- (-18):

 Exacting Petals, Terribly Gigantic Megaphones Killed

1 Million Microscopic Nasturtiums Picked Freshly by Attorneys.

A subset of the prefixes is Tera- (12), Giga- (9), Mega- (6), Micro- 6), Nano- 9), Pico- 12), Femto- (-15),Atto- (-18):

 The Gooey Monster May Not Pick Five Apples. Arithmetic MDAS - My Dear Aunt Sally

Mnemonic device

Please Exuse My Dear Aunt Sally

Explanation

Order Of Operations- parentheses,exponents,multiplication, divison, addition ans subtraction

Mnemonic device

Please Excuse My Dear Aunt Sally For Little Rock

Explanation

Used to remember the order of arithmetic operations (Parentheses, Exponent, Multiply, Divide, Add, Subtract, From, Left, to Right)

Mnemonic device

People everywhere must devour additional seafood.

Explanation

Order of operations

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Order of Calculations in Math

For remembering the order of calculations in math:

Put Every Man Down And Shout

Also:

Please Excuse My Dear Aunt Sally Please Execute My Dog And Soon

The order: Parentheses, Exponents, Multiplication, Division, Addition, Subtraction.

Mnemonic device

Kentucky Chicken Fried

Explanation

Used to remember division of fractions rule: Kentucky: "K"eep the first fraction

Chicken: "C"hange the division to multiplication Fried: "F"lip the second fraction

Dividing Fractions

Kentucky Chicken Fried

Notice the name is switched a little from that most famous fast-food chicken joint from blue grass country. Use "Kentucky Chicken Fried" to remember KCF.

K -- Keep (the first fraction)

C -- Change (the sign from divide to multiply) F -- Flip (the last fraction)

Mnemonic device

I ate and ate until I was sick on the floor. 8 x 8 = 64.

Explanation

multiplication mnem. Mnemonic device

8 times 8 fell on the floor, pick it up and its 64

Explanation

its an easy way to remember 8 x 8. Mnemonic device

Six and Eight went out to skate, when they came back they were fourty-eight.

Explanation

A mnemonic to remember what 6x8 is Mnemonic device

To multiply by 9, hold hands palm down in front of you, and fold down the finger (counting from the left pinky to the right pinky) of the number multiplied by 9. The fingers to the left of the folded down one will give you the number of tens. The fingers to the right of the folded down one will give you the number of ones.

Explanation

Multiplication of 9 x any number from one to 10) Mnemonic device

The Rule of Nines - Multiplication

Explanation

Between one times and 9 times nine, the numbers in the result always add up to nine ! 9 1+8 2+7 3+6, etc.

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The Rule of Nines - Multiplication

Between one times and 9 times nine, the numbers in the result always add up to nine ! 9 1+8 2+7 3+6 etc. Mnemonic device

Does McDonald's Sell CheeseBurgers and Shakes? (DMSCBS)

Explanation

Order of the algorithm of a long division problem. DMSCBS stands for Divide, Multiply, Subtract, Check that the divisor is larger than your remainder, Bring down the next number, and Start all over again.

Mnemonic device

No Dirty Dogs! Numerator Divided (by) Denominator

Explanation

To read or convert fractions rememberNumerator Divided (by) Denominator.3/53 divided by 5 = 0.6 Hint: the decimal six tenths is equivalent to three fifths.

Students tend to divide the LARGER # by the SMALLER number and commonly miss these types of items. Also, I teach my students to automatically "annex 0's by writing the "understood decimal, placing it on the quotient bar directly above, and then annexing at least two zeros.

Mnemonic device

Everybody's Daddy, Mother, Sister, Brother, Reunion, Celebration

Explanation

Estimate, Divide, Multiply, Subtract, Bring Down, Redo (all steps), Check (by multiplying the quotient - plus any remanider times the divisor.) Students use compatable numbers to estimate the quotient. Then - follow each step to complete the division. ALWAYS check by multiplication to find the dividend. Note: If it is a decimal number that repeats - it will never be the exact dividend but will round to the exact dividend.Brenda Woods shared this one & my stuedents added the ist & last words.

Mnemonic device

Dull Monkeys Swim Backwards or

Does Mcdonalds Sell Burgers

Explanation

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Mnemonic device

"Mr. Mean" draw a face + +

C

- supposed to be division symbol

Explanation

Mr. Mean never smiles and makes you work start with the eyes-add #'s

nose-count #'s

mouth-divide by that number

The steps for long division Dracula Must Suck Blood

1) The steps for long division are Divide, Multiply, Subtract, Bring Down:

 Dad Mom Sister Brother

 Dead Monkies Smell Bad

2) Everybody's Daddy, Mother, Sister, Brother, Reunion, Celebration for:

Estimate, Divide, Multiply, Subtract, Bring Down, Redo (all steps), Check (by multiplying the

quotient - plus any remanider times the divisor.) 3) Does McDonald's Sell CheeseBurgers and Shakes? Order of the algorithm of a long division problem:

Divide, Multiply, Subtract, Check that the divisor is larger than your remainder, Bring down the

next number, andStart all over again.

Mnemonic device

BODMAS

Explanation

stands for Bracket Of Division Multiplication, Addition and Substraction.. Mnemonic device

BIDMAS

Explanation

Brackets, Indices, Division, Multiplication, Addition, Subtraction Mnemonic device

Please Excuse My Dear Aunt Sally!

Explanation

PEMDAS,the order of operations. Parenthesis

Exponents

Multplication or Division [which ever is first from left to right] Addition or Subtraction [which ever is first from left to right]

Sentence to remember Roman Numerals

The ascending order of Roman numerals: LCDM:

Lucky Cows Drink Milk Lucy Can't Drink Milk

The Roman numerals in order for I, V, X (1, 5, 10)

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The Roman numerals in order for I V X L C D M (1 5 10 50 100 500 1000)

I Value Xylophones Like Cows Dig Milk

A Poem to remember all the Roman numerals:

M's "mille" (or 1000 said) D's half (500 - quickly read!)

C's just a 100 (century!) and L is half again - 50! So all that's left is X and V (or 10 and 5) - and I - easy!

Algebra

On another mathematical subject, some uses EIEIO as a

mnemonic for extracting roots and when the absolute value symbols are required in the answer Even Index, Even In yielding Odd (exponents).

Many people remember the Order of Operation in Maths with the word Brackets Of (fractions: 1/2 of 2)

Division Multiplication Addition Subtraction (BODMAS or BOMDAS)

Order of Operations

PEMDAS- Parenthesis, Exponents, Multiplication & Division, Addition & Subtraction can be remembered by the phrase: "Please excuse my dear Aunt Sally."

For those wishing to remember which is the domain and which the range: ^ y | |---\___ | _ \__|~@@@@@@@ | |_| \ ~~@@@@@@ |____ / ~~@@@@@@@ |____| / |---/ | +---> x Mnemonic device

DRY MIXRemember variables and how to graph.

Explanation

DRY- dependent or responding variables are graphed on the Y-axis.Note: The letter "Y" reaches up vertically and the letter "X" goes across itself.MIX -independent or manipulated variables are graphed on the X-axis. (I don't know who came up with this one.)

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How to multiply two binomials together?

BINOMIAL MULTIPLICATION

If you had to multiply two binomials together such as (a+b) and (c+d), how would you keep track of the resulting products to make sure that you have multiplied everything and not left anything out.

Think of FOIL

First, Outer, Inner, Last

(a+b)*(c+d) = ac(first) + ad(outer) + bc(inner) +bd(last)

Factoring a Trinomial with a Lead Coefficient

The "3R" Method:

1. "R"emove the lead coefficient, but don't throw it away. Multiply the constant with the lead coefficent.

2. Factor the remaining trinomial

3. "R"eplace the lead coefficent you removed. Put it in front of both x's.

4. "R"educe! Reduce the numbers in each set of parenthesis, as you would a fraction, to lowest terms.

5. Optional - use the FOIL method to check and see that I am right.

*note: if the three numbers in the trinomial have a common factor it must be factored out in the beginning for the "3R" method to work.

Mnemonic device

The alligators always want to eat the most they can. (They always eat the bigger number.) EX: 1 < 2

Explanation

Helps with greater then and less then. Mnemonic device

Pinch goes to the smaller number

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3 < 4, 4 > 3 (Pinch the 3) Mnemonic device

Negative B, negative B, plus or minus the square root, plus or minus the square root, of B squared minus 4 A C, B squared minus 4 A C, all over 2 A, all over 2 A.

Explanation

This is sung to the tune of Frare Jacques. It is the quadratic formula Mnemonic device

< is an arrow point shooting LEFT (LESS THAN)> Is an alligator's mouth opening to the larger food (GREATER THAN).

Explanation

-9<2 Negative nine is less than (or to the left on the number line of) two. 75%> 1/2 Seventy-five percent is greater then (50%) 1/2.

Solving absolute value inequalities

When solving absolute value inequalities: if the absolute value is greater than a number you must use the conjunction OR, when the absolute value is less than a number you must use the conjunction AND. To remember this just remember two words "GOR"-"LAND," which translate into "G(greater)OR" and"L(less than)AND". When I introduce this topic I tell students that we are about to enter "GOR-LAND." (no political implications intended)

Mnemonic device

NO GAINS ON SACRIFICE

Explanation

NO GAINS ON SACRIFICE Is a Mnemonic to remember a Formula for Gain Ratio and Sacrifice RatioGain Ratio = New Ratio - Old RatioSacrifice Ratio = Old Ratio - New RatioThis Slogan or Proverb is applicable for all Parents who sacrifice for their Children without expecting any Gains for their sacrifices. This Formula is usefull in application of Profit Sharing Ratio in case of a partnership firm.In case a new partner is admitted into the Business then the old profit sharing is no longer valid and a new profit sharing ratio is required. Besides Bringing capital into the business the new partner is also supposed to bring some additional funds as gift for the old partners. This gift is called as Goodwill. So when the New Partner brings Goodwill Amount into the business this amount is supposed to be distributed to the old partners in Sacrifice Ratio.The Formula for Sacrifice Ratio BeingOld Ratio - New Ratio Similarly when any partners retires from Partnership Firm the Outgoing partner is supposed to get his share in the Goodwill of the partnership firm. In this case the Remaining partner [those who continue to be in Business and do not retire] are supposed to Contribute for Goodwill for the retiring partner. This Contribution is in Gain Ratio whihc is calculated as followsNew Ratio - Old Ratio

Several Mnemonics for Equation Solving

Greg Smith: I use many SMATHism 's in class. Here are several:

In equation solving, I emphasize that we always do "things" in pairs to maintain equality in mathematices. In equation solving, I emphasize that we need only perform one opposite to "get rid of" something

.

For equation solving when we want to undo something, we use B. S. well actually double B. S. to determine where to perform the operation the Back Side of Both Sides of the equation, or the Bottom Side of Both Sides of the equation.

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The verb always becomes the equal sign in equations.

Formulas:

A=(pi)r^2 Apple pies r square A=(pi)r*r Apple pies r round C = (pi)d Cherry pie delight

I = p r t I "am" p-r-t pronounced I am pretty

rt = d rt are d pronounced retard

The three s's of equation solving: Substitute, simplify, solve

POLYGON

Mnemonics: dont try quitting please have hope or never do it

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Trigonometry

Mnemonic device

Some Old Hags Can't Always Hide Their Old Age

Explanation Trigonometry:

Sine = opposite /Hypotenuse Cosine = Adjacent/Hypotenuse Tangent = Opposite / Adjacent Mnemonic device

"TSC! TSC!" said the math teacher.

"It's Over All Our Heads, AssHole," said the miscreant in the back.

Explanation

TSC is Tangent, Sine, Cosine. Over: Opposite All: Adjacent Our: Opposite Heads: Hypotenuse Ass: Adjacent Hole: Hypotenuse

It's not brilliant. I came up with it when I was about fifteen. But it worked. Mnemonic device

Some People Have Curly Black Hair Thickly Plasterd Back

Explanation

To remember trigonometric functions by first letters. sine = perpendicular / hypotenuse.

cosine = base / hypotenuse tan = perpendicular / base Mnemonic device

Some People Have Curly Black Hair Turning Purple Blue

Explanation In Trignometry,

Sine=Perpendicular/ Hypotinuous, Cosine= Base/ Hypotinuous, Tan=Perpendicular/Base "SOHCAHTOA":

SOH: sine x = opposite side / hypotenuse CAH: cosine x = adjancent side / hypotenuse TOA: tangent x = opposite side / adjacent side Mnemonic device

SOH-CAH-TOA

Explanation

Pronounced "soak a toe-uh"SOH ... Sine = Opposite leg divided by the Hypotenuse CAH ... Cosine = Adjacent leg divided by the Hypotenuse TOA ... Tangent = Opposite leg divided by the Adjacent leg Many secondary school students remember the basic trigonometric functions with the phrase SOH-CAH-TOA (pronounced "soak a toe-uh").

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CAH ... Cosine = Adjacent leg divided by the Hypotenuse TOA ... Tangent = Opposite leg divided by the Adjacent leg

The sine, cosine, and tangent ratios in a right triangle can be remembered by representing them as strings of letters, as in SOH-CAH-TOA:

Sine = Opposite ÷ Hypotenuse Cosine = Adjacent ÷ Hypotenuse Tangent = Opposite ÷ Adjacent

Also used is its reverse, OHSAHCOAT (pronounced oh-sah-coat). It is interpreted as OHS-AHC-OAT, as shown below.

Opposite ÷ Hypotenuse = Sine Adjacent ÷ Hypotenuse = Cosine Opposite ÷ Adjacent = Tangent

One way to remember the letters is to sound them out phonetically (i.e. "SOHCAHTOA").[12]_Another

method is to expand the letters into a phrase, such as

"Some Old Horses Chew Apples Happily Throughout Old Age"

 Or, as popularized at Cincinnati's St. Xavier High School, they use the simple phrase Sally Can

Tell : Oscar Has A Hard On Always. (It's been theorized that mnemonic devices that reference strong

emotions, such as sexual feelings, imprint a stronger memory. However "Hat On" works equally well, but seems to be less memorable.)

 Oscar Had A Heap Of Apples also works if you can remember the sine, cosine, tangent order.

 "One Hopes, And Hopes, On America" was widely taught to British schoolchildren during World War II (the sine-cosine-tangent order was presumed). Not only was it a good mnemonic, it also served to reassure the children that Great Britain was not doomed to Nazi annihilation.

 You can also remember the basic trigonometric functions with the phrase "Some Old Hippie, Caught Another Old hippie, Tripping On Acid"

For remembering the sign of trig functions in the quadrants: All Suckers Take Calculus: in quadrants one through four S | A

---|--- T | C

(This MUST be viewed in a non-proportional font): --- | | | SIN---COS | | \ / | | \ / | | \ / | | TAN--1--COT | | | / \ | | | | / \ | | | |/ \| | | SEC CSC | | |

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---

(SIN TAN SEC on left, CO-functions on right, 1 in the middle)

Using this chart (I just look at it in my head) you can remember the following things: Across the 1:

1/SIN=CSC or 1/CSC=SIN 1/TAN=COT or 1/COT=TAN 1/SEC=COS or 1/COS=SEC Down any triangle:

SIN^2+COS^2=1 TAN^2+1 =SEC^2 1+COT^2=CSC^2 Up any triangle:

SEC^2-1 =TAN^2 or 1+TAN^2=SEC^2 CSC^2-1 =COT^2 or CSC^2-COT^2=1 1-SIN^2=COS^2 or 1-COS^2=SIN^2

A function and its two nearest CLOCKWISE or COUNTERCLOCKWISE neighbors around any edge of the square:

(listed starting at tan going clockwise) TAN=SIN/COS

SIN=COS/COT COS=COT/CSC CSC=SEC/TAN SEC=TAN/SIN

(listed starting at tan going counter-clockwise) TAN=SEC/CSC

SEC=CSC/COT CSC=COT/COS COS=SIN/TAN SIN=TAN/SEC

A function and its two neighbors around any edge of the square: (listed starting at tan going clockwise)

TAN=SIN*SEC SIN=COS*TAN COS=COT*SIN CSC=COT*SEC SEC=TAN*CSC Mnemonic device

CAST going clockwise starting from bottom right quadrant of graph axes. Always measure from the x axis to the angle line.

Explanation

C is the area where the angle is postive for Cosine.

A is the area where the angle is postive for all trigonometric functions. S is the area where the angle is positive for Sine.

T is the area where the angle is positive for Tangent. Mnemonic device

All Saints Take Cocaine

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Trigonometric relation to remember All are positive in first quadrant, Sine is positive in second, Tangent is positive in third and Cosine is positive in fourth

Sine? Cosine? Tangent?

1) An easy way to remember these relationships for trig functions and the right triangle. Just write down

this mnemonic:

SOH - CAH - TOA

It is pronounced "so - ka - toe - ah".

The SOH stands for "Sine of an angle is Opposite over Hypotenuse." The CAH stands for "Cosine of an angle is Adjacent over Hypotenuse."

The TOA stands for "Tangent of an angle is Opposite over Adjacent." Thanks Bob H.

2) Opposite /(over) Adjacent = Tan Opposite /(over) Hypotenuse = Sine Adjacent /(over) Hypotenuse = Cosine

To remember this just learn the following phrase:

One Ancient Teacher Of History Swore

At His Class

Geometry

POLAR COORDINATES! WAYAYAY SIN! Mnemonic device

All Students Take Calculus

Explanation

In quadrant I All trigonometric functions are positive; in quadrant II only Sine is; in quadrant III only Tangent is; and in quadrant IV only Cosine is.

Mnemonic device

Add Suka To Coffee

Explanation

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Mnemonic device

Ang Sarap Talaga ng Cobra

Explanation

Mnemonic device

pe"rim"e t er

Explanation

The t looks like a plus sign; therefore you add the rim (sides) Mnemonic device

2(Little Willy)+ 2(Lost His)+ 2(White Hat)

Explanation

surface area of a rectangle: 2LW+2LH+2WH

Mnemonic device

pahinge ng email add para ma e=a/d = c/a sa facebook

Explanation eccentricity

Calculus

 For remembering the order of taking the derivative of a quotient in calculus, the phrase "ho-di-hi, hi-di-ho, ho-ho" can be useful, where ho means the bottom, hi means the top, and di means the

derivative. So,

Another phrase that one may use is: "Bottom d Top, Top d bottom", where "d" stands for derivative (note that this mnemonic does not include the crucial dividing by the bottom squared). Another phrase memorable for sounding like a square dance is "low d high less high d low, draw the line and square below."

Differential Calculus

Santa Claus mnemonic

Quotient rule for derivatives ala Cab Calloway: Hodehi minus hideho over hoho. Is dc negative?

Means Integrate Sine / Differentiate cos gives negative

Differential Equation

Mnemonic device

Yes p dx equals sques p dx dx

Y times e raised to the integral of pdx equals integral of q times e raise to intgral of pdx dx

Explanation

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Probability and Statistics

Mnemonic device

Mean, M-E-A-N,Add the numbers, then,Count the numbers and divide,Mean, M-E-A-N.

Explanation

Helps students remember the steps to find the mean.To remember how to find the mean, or average of a group of numbers, sing this song to the tune of "Row, Row, Row Your Boat".

Mnemonic device

MEAN means the Average.MODE is the Most frequent.MEDIAN is the middle in a numerically ordered set of data.Range is all #'s that are located on the number line between the highest & lowest data.

Explanation

Mean - Add all data & use this sum as your dividend when you divide by the total number of data in the set.Mode- There is NO MODE UNLESS one and only one number appears more than any other number in the data set!Median - There will be two ordinal numbers in the middle of an even set of data. Find the mean / average. This quotient may be a decimal number but there can be ONLY ONE MEDIAN NUMBER!Range - Simply subtract the lowest data # from the highest data #. Note: You usually do not include the extremes unless you are asked to give the range of prices. Ex. Dresses are - $48, $50. $77. $98. In this case, the range of prices is from $48.00 to $98.00 and does include the two extremes.

Remembering the methods of finding averages

Four methods of finding averages…

Mode - is the number (or numbers) that appears most frequently in a set.

Median - is the number exactly in the middle when a set of numbers is listed in order. Mean - is the sum of a set of numbers, divided by the number of numbers in the set. Range - is the difference between the highest and lowest numbers in a set.

Here is the way to remember these four methods of finding averages…

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ELECTRONICS

DISCO - in Dc analysis, Inductor Short, Capacitor Open

Sa DC hihilahin lang yung schematic symbol. Bali yung inductor -oooo- pag hinila shorted --- ... ung capacitor -||- pag hinila open -| |- same sa steady state response. Pwede din gamitin yung schematic symbol para sa capacitor blocks dc, inductor blocks ac.

Electricity & Magnetism Maxwell Relations

A mnemonic used by physics students to remember the Maxwell relations in thermodynamics is "Good Physicists Have Studied Under Very Fine Teachers",

which helps them remember the order of the variables in the square, in clockwise direction. Another mnemonic used here is

"Valid Facts and Theoretical Understanding Generate Solutions to Hard Problems", which gives the letter in the normal left to right writing direction.

Mnemonic device

Jejemon for Ferromagnetic and Jejebuster for Ferrimagnetic

Explanation

Ferromagnetism (all domains align in parallel) and Ferrimagnetism (some domain are anti-parallel)

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DC/AC Circuits Ohm's Law

Virgins Are Rare

for: volts = amps x resistance

E = Volts

I = Current (Amperes) R = Resistance

I = E/R or Current = Voltage / Resistance E = I*R or Voltage = Current * Resistance R = V/E or Resistance = Voltage / Current

The Indian sees the Eagle Over the River _________E__________

_____I_________R____

Sort of an Ohm's Law Mnemonic

Voltage Formula?

Voltage = Current x Resistance

 VladImiR Putin (V = IR)

 Voodoo Doll = Curse

x Revenge

ICE - ELI :) Inductor Current Lags Voltage, Capacitor Current Leads Voltage

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E ( L ) I

Voltage leads Current in an Inductor I ( C ) E

Current Leads Voltage in a Capacitor

For current and voltage phase relation in capacitors and inductors

CIVIL

C I V I L Capacitor Current Voltage Current Inductor

in a capacitor, current lead voltage voltage leads current in an inductor

Current Leads or Lags Voltage in Reactive Circuits

Whether current leads voltage or lags it in reactive circuits.

In inductive ('L') circuits, voltage ('E') leads current ('I'), hence 'E L I'. In capacitive ('C') circuits, it's the other way, so 'I C E'.

ELI the ICE man

Mnemonic device

Twinkle Twinkle Little Star Power equals I squared R

Explanation

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Energy Conversion Energy Transferred

Energy Transferred = Potential Difference x Charge

 E.T's Phone Calls Left and Right Hand Rules

Flemming's Left and Right Hand Rules:

To remember which rule to apply for finding the relationship between motion and magnetic field Generightor : ie use Flemming's Right hand rule for Generators; and Left hand for motors

Losses in a Transformer

Assuming a standard iron or ferrite (ie not air) cored

Transformer:

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Semiconductor Theory

Parts of an Atom

P

rotons

E

lectrons

N

eutrons

PEN

BIG PAA

Boron, Indium, Gallium (all three are trivalent) Phosphorus, Antimony, Arsenic (pentavalents) ECE Reviewee Mnemonics Impurities: BIG PAA

Trivalent: B-oron I-ndium G-allium

(BIG is associated with number 3) P-hosporous

A-rsenic A-ntimony

(P sa umpisa ng PAA is Penta)

Electronic Devices Fundamentals

Resistor color code:

Bad Boys Rape Only Young Girls But Violeta Gives Willingly Grob Said Nothing

 Black Boys Rape Our Young Girls But Virgins Give Willingly.Get Some Now!  Black Boys Raped Our Young Girl But Violeta Gave Willingly, Grabe Siya Noh?!  Bad boys run our young girls behind victory garden walls

 Big boys race our young girls but Violet generally wins.

 Big brown rabbits often yield great big vocal groans when gingerly slapped

 The phrase "Bad Boys Rape Our Young Girls But Violet Gives Willingly" but is used to remember the electronic color codes of resistors, capacitors and other electronic components. A milder version is "Bright Boys Rave Over Young Girls But Veto Getting Wed."

 "Black Bastard Raped Our Young Girl, Bloody Virginity Gone West"

 For EIA electronic color code: Bad beer rots our young guts but vodka goes well – get some now  Bad boys run our young girls behind victory garden walls.

 Bad boys rape our young girls but Violet gives willingly.

 Big boys race our young girls but Violet generally wins.

 Big brown rabbits often yield great big vocal groans when gingerly slapped

 Bak BRO, Yeah Greasy Blubber's Very Grabable, Why?

 B.B. ROY of Great Britan has Very Good Wife

 Bye Bye Rosie Off You Go Birmingham Via Great Western

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 Bye Bye Rosie Off You Go do Become a Very Good Wife

 Bill Brown Realized Only Yesterday Good Boys Value Good Work Order of Colors of Resistors

Electronic resistors have colored bands on them to denote their level of resistance. Each color represents a number from 0 to 9. In the order of the mnemonic:

Bad Boys Ruin Our Young Girls, But Violet Goes Willingly

Bad Black - 0 Girls Green - 5

Boys Brown - 1 But Blue - 6

Ruin Red - 2 Violet Violet - 7

Our Orange - 3 Goes Grey - 8

Young Yellow - 4 Willingly White - 9

Better Be Right Or Your Great Big Venture Goes West Bad Boys Rape Our Young Girls, But Violet Goes Willingly Bad Boys Rape Our Young Girls Behind Victory Garden Walls

Bad Beer Rots Our Young Guts, But Vodka Goes Well. Bad Boys Rough Our Young Girls, But Violet Goes Willingly

Mnemonic device

Better Be Right Or Your Great Big Venture Goes West

Explanation

Ohms value of the color bands of resistors (dark first, light last) Color first&second bands third band Black 0 .0 Brown 1 0 Red 2 00 Orange 3 000 Yellow 4 0,000 Green 5 00,000 Blue 6 000,000 Violet 7 0,000,000 Grey 8 00,000,000 White 9 000,000,000

Mnemonic device

Bad Boys Rape Our Young Girls But Violet Gives Willingly

Explanation

To remember the resistor color code (Rarely used now that the world has gone surface mount) Mnemonic device

Bad Boys Rape Our Young Girls But Violet Gives Willingly.

Explanation

For color bands on transisiters. Black, Brown, Red, Orange, Yellow, Green, Blue, Violet Gold, White Mnemonic device

Bad Booze Rots Our Young Guts, But Vodka Goes Well

Explanation

Resistor color band digit order: Black [0], Brown [1], Red [2], Orange [3], Yellow [4], Green [5], Blue [6], Violet [7], Gray [8], and White[9].

Mnemonic device

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Explanation

It is the resistor color code:Black, Brown, Red, Orange, Yellow, Green, Blue, Violet, Gray, White. Numerically 0-9 to get the value of a resistor via the color coded bands.(From an old Boy Scout book on Electricity or Electronics)

Also note that red through violet are the colors of the rainbow (in order) although the ROY G. BIV mnemonic for rainbow colors includes indigo between blue and violet.

Capacitor

Mnemonic device

yung AC makakadaan sa capacitor kasi umiilag..kaya high pass.. Transistors

Pee iN the Pot (PNP)

For transistors: to remember which one has the arrow pointing toward the intersection of the connections.

Transistor: ( use with electronic standard symbol) PNP - Pasok Na Pasok

NPN - NaPalabas Na NaPasok Na

ECE Reviewee Mnemonics PNP - Pasok Na Pasok, NPN - Na

Pasok Na (so lalabas na sya), reminder lang :)

Transistor configuration: ACE, BCB, GEB

ACE => Alpha = iC/iE BCB => Beta = iC/iB GEB => Gamma = iE/iB FIFO - First In First Out LILO - Last In Last Out

Computer Principles

Mnemonics in computer science tend to be less pervasive as most abbreviations are brief. Some terms still warrant a mnemonic such as People Can't Memorize Computer Industry Acronyms (PCMCIA) PCMCIA:President Clinton Makes Cornbread In Arkansas

Through the 1990s, whenever I heard about ISDN, I always thought "It Still Does Nothing."

It's because the standard documents for ISDN came out around 10 years before you could actually buy any product. When Broadband ISDN came out (B-ISDN) there was around 3 years between

standard and product, and we knew that as "But It Still Does Nothing". For the order of declarations in Pascal:

Let's Cook Textured Vegetable Protein

For: Labels, Constants, Types, Variables, Procedures Mnemonic device

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Explanation

A mnemonic for the correct spelling of the word 'HTML' (hyper text markup language) To remember the spelling of html, instead of hmlt or hltm.

Mnemonic device

People Cannot Memorize Computer Industry Acronyms

Explanation

The PCMCIA is an acronym for Personal Computer Memory Card International Association (also has been known as Peripheral Component Microchannel Interconnect Architecture (IBM)). Typically they are referred to as PC Cards for simplicity.

PC Cards

Personal Computer Memory Card International Association:

People Cannot Memorize Computer Industry Acronyms People Cannot Make Clear, Intuitive Acronyms Personal Computer Manufacturers Can't Invent Acronyms

The PCMCIA also has been known as Peripheral Component Microchannel Interconnect Architecture (IBM). Typically they are referred to as PC Cards for simplicity.

Mnemonic device

LoVe HAte (LVHA)

Explanation

In CSS the correct sequence to declare pseudo-selectors of anchors: Link, Visited, Hover, Active

Cascading Style Sheets

When designing a page using CSS, the order used to design links is:

Link, Visited, Hover, Active: LoVe HAte

Top, Right, Bottom, Left: TRBL (TRouBLe)

Tommy Ran By Lucy

("LoVe HAte" indicates the correct order to specify the link state pseudo-classes in Cascading Style Sheets. "TRBL" indicates the correct order to set margins or padding.)

Mnemonic device

Every Rabbit Associates Kindly With Gophers

Explanation

6 Step Process for drawing an ER schema.

Identify: Entities, Relationships, Attributes, Key constraints, Weak entities, Generalizations Mnemonic device

He Plays Ball

Explanation

Turning off a computer Hold Power Button Mnemonic device

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Explanation

In Linux, pressing Ctrl+Alt+SysRq (Print Screen, on modern keyboards), releasing SysRq, and, still holding Alt, pressing R E I S U B in that order (with a slight pause between each) will reboot even the most stubbornly frozen system.

This works because R E I S U B are the magic SysRq keys that correspond to: resetting the keyboard state, sending SIGTERM to all processes, sending SIGKILL to all running processes, synchronizing all filesystems, unmounting all filesystems, and rebooting.

Networknames translation to IP-adresses

Cute White Babes Loves Hairy Dogs

The order for translating networknames to IP-adresses: Cache WINS Broadcast LMhosts Hosts DNS

Important Keystroke Sequence in Linux Raising Skinny Elephants Is Utterly Boring

"Raising Skinny Elephants Is Utterly Boring" is a mnemonic device for remembering a particularly important keystroke sequence in Linux. In the event of a total system freeze up, this is the failsafe way to safely reboot a near-frozen computer.

Usage

The first two key sequences to deal with a frozen machine are:

Alt + Ctrl + to enter a command prompt. Normally the function keys F1 to F6 can be used.

Control-Alt-Delete. This performs a regular shutdown, if possible, which allows running services to shut down normally.

Using 'RSEIUB' follows these two steps as a last resort. The squence is performed as follows: While holding Alt and SysRq, press they keys R, S, E, I, U, and then B, in sequence, leaving some time between keystrokes.

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S synchronizes the disk

E terminates all processes

I kills all processes

U remounts all filesystems read-only

B reboots the machine

ECE Reviewee Mnemonics RS NAND undefined states-LOW LOW-(think of maLANDi) RS NOR undefined states-HIGH HIGH-(think of HORny)

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GEAS

Chemistry Sentences to remember the elements

Periodic Table

Group 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Period 1 H He 2 Li Be B C N O F Ne 3 Na Mg Al Si P S Cl Ar 4 K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr 5 Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe 6 Cs Ba * Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn 7 Fr Ra ** Rf Ha Sg Ns Hs Mt Uun Uuu

/

Lanthanides * La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Actinides ** Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr

bron: Carcamels Homepage

Mnemonics:

1) First eighteen elements in the periodic table:

Here He Lies Beneath Bed Clothes, Nothing On, Feeling Nervous. Naughty Margaret Always Sighs, "Please Stop Clowning Around."

(H He Li Be B C N O F Ne Na Mg Al Si P S Cl Ar.) 2) First twenty elements in the periodic table:

Hi Hello Little Beryll Brown Cracking Nuts On Friday . Nellie's Naughty Magpie Always Sings Pop Songs Clearly After Killing Cathy

(H He Li Be B C N O F Ne Na Mg Al Si P S Cl Ar K Ca.)

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Memorize these phrases to learn the first eighteen elements – when you are done, make up your own phrases for some of the others.

Happy Henry Likes Beer But Could Not Obtain Food

Happy Henry Likes Beer But Could Not Obtain Four Nuts

That gives us the first 10: Hydrogen, Helium, Lithium, Beryllium, Boron, Carbon, Nitrogen, Oxygen, Fluorine, Neon.

Naughty Magpies Always Sing Perfect Songs Clawing Ants

That gives us the next 8: Sodium (NA), Magnesium, Aluminum, Silicon, Phosphorous, Sulfur, Chlorine, Argon

group 1: HaLiNa Kayo Cesar at Ruby sa France! (H,Li,K,Cs,Rb,Fr) group 2: Be, MgCano ka Sr. BaRat?

group 14: Cool Si General Sn. Pablo

group 16: O! Sarap ng Senegang Tenapay at Poto grouop 18: HeNela ni Arlene ang Krayola ni Xena at Rona

Periodic Table

Hydrogen He Lies Beneath Bright Coloured Nights Of Flame Neon Natures Magicians All Sing Psalms So Clearly Argon King Califf Scatters Titles Vainly Crowning Men Fee Coh & Ni CuZn Gar & Gee As Seven Brothers Krypton

Note CuZn is pronounced Cousin, Ni is pronounced Knee. First row transition elements:

Some Tasty Virgins Can Make Fairly Calm Nice Chemists Zealous! Sc Ti V Cr Mn Fe Co Ni Cu Zn

Scandinavian television corrupts many french coalmen's nieces and cousins Sc Ti V Cr Mn Fe Co Ni Cu Zn

Scottish Vicars Make Fur Coats and Knickers Sc Ti V Cr Mn Fe Co Ni Cu Zn

Stop the very crazy man from coming near cute zoos Sc Ti V Cr Mn Fe Co Ni Cu Zn

and

Your zoo needs men to rule rhinos, panthers, and cheetahs Yt Zr Nb Mo Tc Ru Rh Pd Ag Cd

SCrub TIl Very CRean... MaNy FEmales COntain NIce CUrvy ZoNes And going downward (VIII B), NIce PaDded ParTs,

and the money (I B) Copper, silver and gold that you have to pay. and after all that, (II B) If you're a Cad, you're lucky if the date ends with a Hug

 The Group VIII inert gases (helium, neon, argon, xenon and radon) may be recalled by the sentence "Heaven Never Arsked Kriegspiel's eXtra Rent"

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Ito yung groupings ng elements (you need to know their general properties): Alkali Metal Alkaline Earth Basic Metal Halogen Noble Gas Non-Metal Rare Earth Semi-Metal Transition Metal Mnemonic device

How He Lies Because Boys Can Not Open Flowers

Explanation

First nine elements in the Periodic Table Mnemonic device

Harry He Likes Beer But CanNot Obtain Food

Explanation

To remember the first few elements of the Periodic Table. Mnemonic device

Here Lies Benjamin Bold; Cry Not Old Friend; Needlessly Nature Magnifies All Simple People Sometimes, Clots and Kings.

Explanation

To remember the first few elements of the Periodic Table. Mnemonic device

Hi Hello Little Beryll Brown Cracking Nuts On Friday. Nellie's Naughty Magpie Always Sings Pop Songs Clearly After Killing Cathy

Explanation

Periodic Table - Atomic Weight 1st Twenty ElementsHydrogen 1, Helium 2, Lithium 3, Beryllium 4, Boron 5, Carbon 6, Nitrogen 7, Oxygen 8, Flourine 9, Neon 10, Sodium 11, Magnesium 12, Aluminium 13, Silicon 14, Phosphorous 15, Sulphur 16, Chlorine 17, Argon 18, Potasium 19, Calcium 20

Mnemonic device

The Periodic Table (contributors include Bob Gayhart and Dean Campbell) Group 1A (H Li Na K Rb Cs Fr): -Highly Nasty Kids Rub Cats Fur -Hans liebt Natuerliche Kaese reibt (ueber)

(c)zentralsued Frankreich. (!) Group 2A (Be Mg Ca Sr Ba Ra): -Bearded Muggers Came Straight Back Rapidly. -Beer Mugs Can Serve Bar Rats. Group 3 (B Al Ga In Tl): -Big Al Garner's In Trouble. -Big All Gave in Tulsa. -Big Al Gave Incomplete Totals. -Big Al Gave Innocent Toys. -Bob Allen Gave Indians Tennis Lessons. Bears Always Give Indians Trouble. Group 4A (C Si Ge Sn Pb): -Can Silly Germans Snatch Lead? -Conniving Sisters Get Snotty Playboys. --Can Si Get Snuckered at the Pub? Group 5 (N P As Sb Bi): -New Popes Assign Subordinate Bishops. -Never Put Arsenic in Silver Bullet Beer. Group 6A (O S Se Te Po): -Oil is slicker with STP. -Old Soldiers Seem Terribly Polluted. -Oversized Sailors Sell and Tell about Polo cologne. -Oh, she sells the poles. Group 7A (F Cl Br I At): -Frank Cleverly Brought Indian Attire. -Fairy Clowns Broil Innocent Ants. -Fat Clyde Bribed Innocent Arthur. -"Floor Cleaner Broken?" I asked. Group 8A (He Ne Ar Kr Xe Rn): -He Never Arrived; Karen eXited with Ron. -He needs our crazy Xerox repairman. First Row Transition Metals (Sc Ti V Cr Mn Fe Co Ni Cu Zn): -St. Vincent Cried "Mommy!" Feeling Cold Next to Cold Zombies. -Scott Tips Very Counterfeit Money, Feels Cold Near Cubic Zircons. -Scary Tiny Vicious Creatures Mean Females Come Nightly to Club Z. -Scotty Vickerman Fee cony cousin. -Scott

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tickled Vanna's cranium, manager Fred could not cut in. Second Row Transition Metals (Y Zr Nb Mo Tc Ru Rh Pd Ag Cd): -Yes sir, Nob. Most technicians rub Rod's pale silver Cadillac. Third Row Transition Metals (La Hf Ta W Re Os Ir Pt Au Hg): -Larry's half taken, Wendy reached out her plate audibly, Helga. Lanthanides (Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu): -Caesar

Procrastinated at the Nile, Permitting So Many Europeans (who were) Getting Turbid (and) Dying (of) Home Urges (erges?) To Yell "Lutetium!". -Cecil proudly named Pam, Sam, (and) Eugene. Good Tobin dyes hosiery early tomorrow yellow-blue. Actinides (Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr): -Three planets: Uranus, Neptune, (and) Pluto. Amy cured Berkeley, California. Einstein (and) Fermi made noble laws.

Explanation

I think no explanation is needed to use that mnemonic.Its simple but effective Mnemonic device

Please Stop Calling My African Zebra In Latin Class.

Explanation

Used to remember the reactivity series.

Pottasium, Sodium, Calcium, Magnesium, Aluminium, Zinc, Iron, Lithium, CARBON.

ECE Reviewee Mnemonics Grp 6 of Periodic Table:

Our Solid Sex Temporary Position- Oxygen, sulfur, selenium, tellurium, polonium

ECE Reviewee Mnemonics Group 7 of Period Table Mnemonic:

Friend, Cool ang Braso, Itlog, at Atay (Flourine Chlorine Bromine Iodine Astatine)

ECE Reviewee Mnemonics Halogens:

For Clear and Bright Is Attractive (Fluorine, Chlorine, Bromine, Iodine, Astatine)..

ECE Reviewee Mnemonics ERRATUM: Group 3 (pababa):

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ECE Reviewee Mnemonics Periodic Table:

Group 1 (pababa):

HaLiNa Kayo Rubi at Cesar sa France (Hydrogen, Lithium, Sodium, Potassium, Rubidium, Cesium, Francium)

Group 2 (pababa):

Be, MgCano kay Sr. BaRat? (Beryllium, Magnesium, Calcium, Strontium, Barium, Radium) Group 3 (pababa):

Baby AlaGa ni Inday at Tita (Boron, Aluminim, Gallium, Indium, Titanium) Group 4 (pababa):

Cool Si General Sn. Pablo (Carbon, Silicon, Germanium, Tin, Lead) Group 5 (pababa):

Nay, Parang ASwang ANg Bisita (Nitrogen, Phosphorus, Arsenic, Antimony, Bismuth) Group 6 (pababa):

O! Sarap ng SEnegang, TEnola at POto. (Oxygen, Sulfur, Selenium, Tellurium, Polonium) Group 8 (pababa):

Henela ni Arlene ang Krayola ni Xena at Rona (Helium, Argon, Krypton, Xenon, Radon) Electron Shells To remember SPDF Some People Don't F***

 "sticky paint dries fast" For the energy levels of electrons.

 I have a relatively good one (albeit fairly useless) for remembering the order that the nuclear shells get filled up as you add more nucleons to the nucleus:

spuds if pug dish of pig

 If you write it down and then cross out all of the vowels except for the final 'i' you get spdsfpgdshfpig

 and since you are worying about nuclear levels, you already know the spectroscopic notation: spdfghi s=0, p=1, ... so if you start numbering above these letters how many times the letter has occured, you get the principal quantum number, and angular momentum of the energy states in the order that they are filled:

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(Remember that in nuclear shells the angular momentum can be greater than the principal quantum number...)

 spectrographic notation:

Sober Physicists Don't Find Giraffes Hiding In Kitchens.

Mnemonic device

Sober Physicists Don't Find Giraffes Hiding In Kitchens

Explanation

The order of atomic orbitals (s,p,d,f,g,h,i,k). After K, they're alphabetical. Electronic Configuration

Si Sally Pumasok Sa Pinto Si Daddy Pumasok Sa Dilim Paano Si Franky Daddy Paano Si Franky Daddy Franky Daddy Franky (Each letter corresponds to the shape fill it in with the principal quantum number start numbering S with 1, P with 2, D with 3, and F with 4)

"si sarah pumunta sa party. si daddy pumunta sa disco. pano si daddy?":

1s 2s 2p 3s 3p 4s 3d 4p 5s 4d 5p 6s 5d

Mnemonic device

si sammy pumasok sa pinto. si daddy pumasok sa door. paano si fred daddy? paano si fred daddy? paano fred daddy?

Explanation

1s 2s 2p 3s 3p 4s 3d 4p 5s 4d 5p 6s 5f 5d 6p 7s 6f 6d 7p 7f 7d Simplified metal electronegativities:

Kill (K) Nasty (Na) Cats (Ca) Mangle (Mg) All (Al) Zebras (Zn) Feed (Fe) Snarling (Sn) Plump (Pb) Hyenas (H) Curse (Cu) Hogs (Hg) Again (Ag) Audibly (Au) Please (Pt) or Pretty (potassium) Sally (sodium) Could (calcium) Marry (magnesium) A (Aluminium) Zulu (Zinc) In (Iron) Lovely (lead) Honalulu (hydrogen-reference) Causing (copper)

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Strange (silver) Gazes (gold) or Pop (Potassium) Stars (Sodium) Can (Calcium) Make (Magnesium) All (Aluminium) Zombies (Zinc) In (Iron) Town (Tin) Lose (Lead) His (Hydrogen) Cool (Copper)

Then we remembered our favourite food addictive for the last 3 metals. (MSG) M (Mercury)

S (Silver) G (Gold)

Electrochemical/-lytical cells:

Two animals -- AN OX and a RED CAT (anode -> oxidation, cathode -> reduction)

 RC cOlA (short for Royal Crown Cola): Reduction occurs at the Cathode,

Oxidation occurs at the Annode

 In a cation, the electron has gone on va-cation.

 Chemistry students use the phrase "LEO says GER" to keep the two halves of a redox process straight, since the Loss of Electrons is Oxidation while the Gain of Electrons is Reduction. Another version is the word "OIL-RIG", meaning Oxidation Is Loss, Reduction Is Gain (of electrons).

 ORE is easier - oxidation is removal of electrons Mnemonic device

LEO GER

Explanation

Chemistry students use the phrase "LEO says GER" to keep the two halves of a redox process straight, since the Loss of Electrons is Oxidation while the Gain of Electrons is Reduction.

Mnemonic device

OIL RIG

Explanation

O-xidation I-s L-oss (of electrons); R-eduction I-s G-ain (of electrons) Mnemonic device

LOAN BRA

ECE Mnemonics 2017.pdf

Compilation of ECE Mnemonics

i

a compilation of mnemonics for

Electronics Engineering (ECE)

by

Compilation of ECE Mnemonics

ii

TABLE OF CONTENTS

Chapter I. Mathematics……….1

Constant………...1

Conversion………...……….3

Arithmetic………5

Algebra………..8

Trigonometry………..13

Geometry………17

Calculus………...17

Differential Equation………..…….……….18

Probability and Statistics……….……18

Chapter II. Electronics………..……….….……….….……….….……….…..19

Electricity and Magnetism……….19

DC/AC Circuits……….….…….20

Energy Conversion……….…….22

Semiconductor Theory……….………...23

Electronic Devices Fundamentals……….…….………..23

Computer Principles……….…….………...26

Chapter III. General Engineering & Applied Sciences……….….……….……..………29

General and Inorganic Chemistry……….………….………..29

Organic Chemistry……….……….39

Physics……….………...42

Thermodynamics……….………42

Strength of Materials……….………..44

Engineering Economy……….……….46

Engineering Management………..……….…………47

ECE Laws……….……….………...48

Contracts and Obligation………...……….….………48

General Knowledge………...…………..………51

Chapter IV. Electronic Systems & Technologies……….….….……….……..62

Principles of Communication……….………..………62

Modulation……….…………..……63

Radio Receiver and Noise……….……….…….63

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Microwave Communication……….………..65

Telephony……….……….……….66

Fiber optics……….………67

Data Communication……….……….…………68

Broadcast and Acoustic……….……….…..72

Transmission Lines……….……….….…73

Wave Propagation and Antenna……….……….……..74

Navigational Aids and Radar……….….…...75

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