A2 Physics Plan of Work (of Sir A. N. Chowhan s online class)

week 1 week 2 week 3 week 4 Motion in a circle

 Angular displacement and angular speed  Centripetal force

Gravitational fields

 Newton’s law of

gravitation

 Motion of satellites

 Gravitational field strength

 Gravitational potential  Gravitational potential

energy

Electric fields

 Coulomb’s law

 Electric field strength (E)

 Electric potential (V)  Determining resultant

E and V due to two charged bodies

Oscillations

 Simple harmonic motion (SHM)

 Displacement, velocity and acceleration in SHM

 Energy in SHM  Damped oscillation  Resonance

week 5 week 6 week 7 week 8

Waves

 Ultrasound production  Acoustic impedance

and intensity reflection coefficient

 Ultrasound scanning

Communication

 Modulation

 Digital transmission  Communication

channels  Satellite

communication  Attenuation, gain and

signal-to-noise ratio (SNR)

Capacitance

 Capacitors in series and parallel

 Energy stored in a capacitor

Electronics

 Electronic sensors  Ideal op-amp

 Inverting op-amp  Non-inverting op-amp  Relay and LED

Magnetic fields

 Force on a current-carrying conductor in a magnetic field

week 9 week 10 week 11 week 12

 Measuring magnetic flux density by a current balance  Velocity selection of

moving charges  Hall voltage

 Determining charge-to-mass ratio of electron  MRI scanning

EM induction

 Laws of EM induction

Alternating current

 Root-mean square current and voltage  Power in a.c. circuits  Transformer

 Rectification of a.c.

Quantum physics

 Particulate nature of EM radiation and photon

 Photoelectric effect  de Broglie wavelength

and electron diffraction  Line spectra

 Band theory

 X-ray and CT scanning

Particle and nuclear physics

 Nuclear binding energy  Nuclear Fusion and

fission reactions  Radioactive decay  Activity, decay

constant and half-life

week 13 week 14 week 15 week 16

Ideal gases

 Equation of state  Kinetic theory of gases  Pressure of an ideal

gas

 Past-paper questions

 K.E. of a gas molecule  Past-paper questions

Temperature

 Temperature scales  Thermometers

Thermal properties of matter

 Specific heat capacity  Specific latent heat  Determining specific

heats

 Past-paper questions

 Internal energy  Simple kinetic model of

matter  1st

law of

thermodynamics  Past-paper questions

CONTENTS

Data 1

Formulae 2

Chapter 1 Physical quantities and units 3 - 4

Chapter 10 Ideal gases 5 - 26

Chapter 11 Temperature 27 - 32

Chapter 12 Thermal properties of materials 33 - 66

Chapter 7 Motion in a circle 67 - 70

Chapter 8 Gravitational fields 71 - 118

Chapter 17 Electric fields 119 - 164

Chapter 13 Oscillations 165 - 214

Chapter 14 Waves 215 - 234

Chapter 16 Communication 235 – 278

Chapter 18 Capacitance 279 - 300

Chapter 19 Current of electricity 301 - 302

Chapter 20 D.C. circuits 303 - 308

Chapter 21 Electronics 309 - 352

Chapter 22 Magnetic fields 353 - 396

Chapter 23 Electromagnetic induction 397 - 420

Chapter 24 Alternating current 421 - 452

Chapter 25 Quantum physics 453 - 522

(Q2/42/M/J/16) 1

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(Q4/41/M/J/17) 1

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(Q2/42/M/J/17) 2

(Q2/42/O/N/16) 3

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(Q2/42/M/J/16) 5

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(Q2/43/O/N/15) 8

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1 (a) random/haphazard B1 constant velocity or speed in a straight line between collisions B1 or

distribution of speeds/different directions

(b) (small) specks of light/bright specks/pollen grains/dust particles/smoke particles M1 moving haphazardly/randomly/jerky/in a zigzag fashion A1 (c) (i) pV = ⅓ Nm〈c2_{〉 C1}

1.05 × 105_{× 0.0240 = ⅓ × 4.00 × 10}–3 _{× 〈c}2_〉

〈c2_{〉 = 1.89 × 10}6

C1

or

½ m〈c2_{〉 = (3 / 2) kT (C1)}

0.5 × (4.00 × 10–3 _{/ 6.02 × 10}23_{) × 〈c}2_{〉 = 1.5 × 1.38 × 10}–23 _{× 300}

〈c2_{〉 = 1.87 × 10}6

(C1)

or

nRT = ⅓ Nm〈c2_〉

(C1) 1.00 × 8.31 × 300 = ⅓ × 4.00 × 10–3 _{× 〈c}2_〉

〈c2_{〉 = 1.87 × 10}6

(C1)

cr.m.s. = 1.37 × 103 m s–1 A1

(ii) 〈c2_〉  _{T C1}

〈c2_{〉 at 177 °C = 1.89 × 10}6 _{× (450 / 300)}

C1 cr.m.s. at 177 °C = 1.68 × 103 m s–1 A1

2 (a) (i) mean/average square speed/velocity B1

(ii) pV = NkT or pV = nRT B1 ρ = Nm / V B1 or

ρ = nNAm / V and k = nR / N

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