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Concepts Of Physics MCQ Edition [Volume 1]PhysicsWave Motion and Waves on a String

A tuning fork with a frequency of 480 Hz is employed to vibrate a sonometer wire that has a natural frequency of 410 Hz . The wire will vibrate at a frequency of

Options

  1. A410 Hz
  2. B960 Hz
  3. C480 Hz
  4. D820 Hz

Correct answer

C. 480 Hz

Step-by-step solution

When a tuning fork is used to vibrate a sonometer wire, it sets up forced vibrations in the wire. In forced vibrations, the system vibrates with the frequency of the external periodic driving force, irrespective of its own natural frequency. Since the frequency of the tuning fork (the driving force) is 480 Hz , the sonometer wire will vibrate at 480 Hz .

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