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Physics (AS & A Level) · May / June 2017 · Paper 13 · Question 23

9702Progressive waves

A trace is shown on the screen of a cathode-ray oscilloscope (c.r.o.). The time-base setting is 2.5 ms cm⁻¹ and the Y-gain is 2.0 V cm⁻¹. What is the frequency and the amplitude of the waveform displayed by the c.r.o.?

  1. Afrequency 0.00375 Hz, amplitude 4.0 V
  2. Bfrequency 0.00375 Hz, amplitude 8.0 V
  3. Cfrequency 267 Hz, amplitude 4.0 V
  4. Dfrequency 267 Hz, amplitude 8.0 V

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Correct answer: C. frequency 267 Hz, amplitude 4.0 V

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