In case of a forced vibration the resonance wave becomes very sharp when the

Options

A. applied periodic force is small
B. quality factor is small
C. damping force is small
D. restoring force is small

Answer

C

Explanation

In resonant vibrations of body, the frequency of external force applied on the body is equal to its natural frequency. If on increasing and decreasing the frequency by a factor, the amplitude of vibrations reduces very much. In this case sharp resonance will take place. but if it reduces by a small factor then that resoance will take place.