Question

1. A person is tuning radio-set to a particular station. What the person is trying to do during tuning?
2. Name the phenomenon involved in tuning radio set.
3. Define the phenomenon named by you in (b).

Answer 1

1. During tuning, the person adjusts the radio so that its natural frequency matches the frequency of the signal sent by the desired radio station.
2. The phenomenon is resonance.
3. Resonance occurs when the frequency of an applied periodic force equals the natural frequency of a body. The body then vibrates with a large amplitude. In a radio, resonance helps select and amplify the signal from the desired station.