Question

How do radio waves reaching the car aerial produce signals in the electrical circuit of the car radio?

a) Radio waves induce vibrations in the car aerial, generating electrical currents that are transmitted to the radio circuit.

b) Radio waves modulate the frequency of the car aerial, converting the variations into electrical signals for the radio.

c) Radio waves create electromagnetic fields in the car aerial, inducing voltage changes that are processed by the radio circuit.

d) Radio waves directly connect to the car radio through the aerial, transmitting information without electrical conversion.

Answer 1

Radio waves create electromagnetic fields in the car aerial, inducing voltage changes that are processed by the radio circuit.

Step-by-step explanation:

Radio waves create electromagnetic fields in the car aerial, inducing voltage changes that are processed by the radio circuit. When radio waves reach the car aerial, they interact with the metal conductor of the aerial. The changing electric and magnetic fields in the radio waves induce a voltage in the aerial, which is then processed by the radio circuit to produce signals. This allows the radio to receive and play the sound waves encoded in the radio waves.