A-LevelPhysicsWaves9702/12 · Feb/Mar 2024 · Q251 Mark
A sound wave is detected by a microphone and displayed on the screen of a cathode-ray oscilloscope (CRO). [Figure showing a waveform on a CRO screen, with 1 cm indicated for both vertical and horizontal axes] The frequency of the wave is 2.5 kHz. What is the setting on the time-base 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.
A0.1 ms cm⁻¹
B0.4 ms cm⁻¹
C0.1 s cm⁻¹
D0.4 s cm⁻¹
✓ Correct answer
A: 0.1 ms cm⁻¹
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