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Physics (AS & A Level) · Oct / Nov 2017 · Paper 13 · Question 22

9702Progressive waves

The graph shows how the displacement of a particle in a wave varies with time. [graph of displacement/cm against time/s, sinusoidal wave with amplitude 2 cm and period 4 s] Which statement is correct?

  1. AThe wave has a period of 2 s and could be either transverse or longitudinal.
  2. BThe wave has a period of 2 s and must be transverse.
  3. CThe wave has a period of 4 s and could be either transverse or longitudinal.
  4. DThe wave has a period of 4 s and must be transverse.

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Correct answer: C. The wave has a period of 4 s and could be either transverse or longitudinal.

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