Tuning of a radio set is an example of:

Explanation

(a) Mechanical resonance: Mechanical resonance refers to the natural frequency at which an object vibrates with maximum amplitude. It is typically associated with mechanical systems like a swinging pendulum or a vibrating guitar string. Tuning a radio set does not involve mechanical resonance. (b) Electrical resonance: Electrical resonance occurs when an electrical circuit or component vibrates at its natural frequency. In the case of a radio set, tuning involves adjusting the circuitry to resonate at a specific frequency, allowing the reception of that particular radio station. So, the correct option is (b) electrical resonance. (c) Musical resonance: Musical resonance is the phenomenon of sound waves reinforcing or amplifying certain frequencies in musical instruments or vocal cords. While tuning a radio set may involve listening to music, it does not directly relate to musical resonance. (d) Free vibration: Free vibration refers to the natural oscillation of an object without any external force or damping. It is commonly observed in systems like a vibrating guitar string. Tuning a radio set does not involve free vibration. So, the correct option for tuning a radio set is (b) electrical resonance because it involves adjusting the electrical circuitry to resonate at a specific frequency for optimal reception.