This document contains 2022 OCR AS Level Physics B (Advancing Physics) H157/02 

Physics in Depth Question Paper.

SECTION A

Answer all the questions.

1 A firework, mounted on the ground, ejects a packet vertically at an initial speed of 35ms–1. The

packet explodes into many glowing fragments when it reaches its highest point.

firework

(not to scale)

θ θ

(a) Show that the height reached by the packet is approximately 60m, assuming that air

resistance is negligible and that the packet was fired from ground level.

[2]

(b) The glowing fragments travel initially horizontally at a speed of 15ms–1.

 Calculate the distance of one fragment from its launch site when it reaches the ground,

assuming no air resistance.

distance = ..................................................... m [2]

3

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(c) Calculate the angle θ with the horizontal at which the fragment hits the ground.

angle = ........................................................° [2]

4

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2 The signal below is a microphone recording of a pure sound wave of frequency f

sound.

0

–500

–400

–300

–200

–100

0

100

p.d./mV

time/μs

200

300

400

500

10 20 30 40 50 60 70 80 90 100

The signal is to be transmitted by radio at a frequency f

radio = 91.5MHz.

(a) Calculate the ratio

f

radio

f

sound

.

f

radio

f

sound

= ......................................................... [2]

(b) A more complex sound signal is a sum of musical notes with a frequency range 18Hz to

24kHz. It is to be encoded as a digital signal before transmission.

 Calculate the lowest rate at which the sound signal should be sampled to avoid distortion.

lowest sampling rate = ..................................... samples s–1 [1]

5

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3 The voltmeter in the circuit below has a very high resistance.

36Ω 47Ω V

4.5V

(a) Calculate the p.d. recorded by the voltmeter.

 Assume that the internal resistance of the battery is negligible.

p.d. = ...................................................... V [2]

(b) Without calculation, state and explain how the voltmeter reading would differ from the

answer to (a) if the battery internal resistance were not negligible.

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