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A-LevelPhysicsWaves9702/12 · May/June 2019 · Q281 Mark

A cathode-ray oscilloscope (CRO) is used to display the trace from a sound wave. The time-base is set at 5 µs mm⁻¹. [Figure 28.1] What is the frequency of the sound wave?

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A6.7 Hz

B67 Hz

C6.7 kHz

D67 kHz

✓ Correct answer

C: 6.7 kHz

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About this question

Topic: Waves, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2019 Paper 1 Variant 2, question 28.

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