WAEC - Physics (2023 - No. 3)
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
240Hz
24Hz
192Hz
286Hz
Explanation
v = 120m/s, λ = 0.50m, f = ?
v = fλ
f = \(\frac{v}{λ} = \(\frac{120}{0.50}\)
Therefore, = 240Hz.
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