Home Physics Wave and Sound Interference and Superposition of Waves A sinusoidal wave with amplitude ym is trave…
Physics Wave and Sound Interference and Superposition of Waves MCQ (Single Correct)

A sinusoidal wave with amplitude ym is travelling with speed V on a string with linear density ρ . The angular frequency of the wave is ꞷ. The following conclusions are drawn. Mark the one which is correct.

A
doubling the frequency doubles the rate at which energy is carried along the string
B
if the amplitude were doubled, the rate at which energy is carried would be halved
C
if the amplitude were doubled, the rate at which energy is carried would be doubled
D
the rate at which energy is carried is directly proportional to the velocity of the wave.

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The correct answer is:
D

So if frequency or amplitude is doubled power will be quadrupled, but if velocity is doubled power will also be doubled.

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