Question

Define resonance......... ​

Answer 1

Answer:

Resonance is a special case of forced vibrations when the natural frequency of the vibrating body is exactly equal to the frequency of the external periodic force applied on the body.

Such vibrations are called resonant vibrations.

The bodies which possess such vibrations are called resonating bodies.

Answer 2

Answer:

The increase in amplitude of oscillation of an electric or mechanical system exposed to a periodic force whose frequency is equal or very close to the natural undamped frequency of the system."