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A-LevelPhysicsWaves9702/12 · May/June 2023 · Q201 Mark

A microphone detects a sound wave. The microphone is connected to a cathode-ray oscilloscope (CRO). The shape of the trace on the screen of the CRO is shown. [Figure 20.1] Which property of the sound wave can be determined by using only the measurement of a horizontal distance on the screen and the value of a control setting of the CRO?

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

Aamplitude

Bfrequency

Cspeed

Dwavelength

✓ Correct answer

B: frequency

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About this question

Topic: Waves, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2023 Paper 1 Variant 2, question 20.

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