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The diagram above illustrates a mode of vibration of a wire of length 125 cm. The...

Physics
WAEC 2023

The diagram above illustrates a mode of vibration of a wire of length 125 cm. The speed of the waves along the wire is 120 ms-1. Use the diagram to answer questions 2 and 3.
Determine the frequency of the waves

  • A. 240Hz
  • B. 24Hz
  • C. 192Hz
  • D. 286Hz
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Correct Answer: Option A
Explanation

v = 120m/s, λ = 0.50m, f = ? 

v = fλ

f = \(\frac{v}{λ} = \(\frac{120}{0.50}\)

Therefore, = 240Hz.


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