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Physics (AS & A Level) · Feb / March 2020 · Paper 12 · Question 23

9702Progressive waves

A sound wave is displayed on the screen of a cathode-ray oscilloscope, as shown. The time-base setting is 0.50 ms per division. What is the frequency of the sound wave?

  1. A500 Hz
  2. B670 Hz
  3. C1000 Hz
  4. D1300 Hz

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Correct answer: B. 670 Hz

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