Question

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

• A. Damping force is small
• B. Restoring force is small
• C. Applied periodic force is small
• D. Quality factor is small

Answer 1

Answer: (A)

Damping force is small

Answer 2

In the case of a forced vibration, the resonance peak becomes very sharp when the damping force is small. This is because the damping force is responsible for dissipating energy from the vibrating system, which tends to broaden the resonance peak. When damping is minimal, the system retains most of the energy provided by the applied periodic force, resulting in a sharp resonance peak.

So, the correct option is (A): Damping force is small.