Question

The tank circuit used in a radio transmitter should have

A) high effective Q.

B) low effective Q.

C) loosely coupled load.

D) Both (A) and (C).

Answer 1

Hint: Transmitter and receiver are electronic devices which are used to transmit and receive useful data and information in the air. Production of radio waves with the help of the antenna provided generates radio frequency on application of current which excites the alternating current and thus produces radio waves and further radiation is done by it.

Complete step by step answer:

Harmonics and fundamental frequency voltages cross-modulate with each other producing fundamental frequency currents whose relation with the normal fundamental current vary with the amount of harmonics in the oscillator circuit. The phase angle of the resultant fundamental frequency current thus varies resulting in frequency variation. Such frequency variation can be minimized by using a tank circuit having high effective Q having loosely coupled load.

Therefore, the correct option is (D).

Additional Information: 

 A transmitter is a necessary component of all electronic devices such as cell phones, television stations, ships etc. They are also used for navigation purposes. Receiver is an electronic device that receives signals and radio waves that are transmitted by the transmitter. The function of transmitting, receiving and accepting of electronic signals works on a particular frequency and converts them to useful form. A decoder is installed in a receiver whose function is to decode and then sends it to the amplifier. An amplifier is an electronic device that converts the signals sent by the receiver to a pair of speakers. The power and current of the signal is increased by an amplifier. The speakers are also known as amplifying devices.

Note: A transmitter of a radio does not work without the help of an antenna. Transmitters used for broadcasting purposes may get damaged due to lightning. Also most of the receivers such as an audio receiver get damaged as they do not have any fuses.