The superhetrodyne principle provides selectivity at ______________stage?

In a superhetrodyne receiver, the difference frequency is chosen as the IF rather than the sum frequency because _________________?

A. The difference frequency is closer to oscillator frequency

B. Lower frequencies are easier to amplify

C. Only the difference frequency can be modulated

D. None of the above

In a TRF radio receiver, the RF and detection stages are tuned to______________?

A. Radio frequency

B. IF

C. Audio frequency

D. None of the above

In the above question, what is the power in sidebands?

A. 8 kW

B. 6 kW

C. 06 kW

D. 9 kW

In TV transmission, sound signal is ______________modulated?

A. Amplitude

B. Frequency

C. Phase

D. None of the above

The diode detector in an AM radio receiver is usually found _____________?

A. Before the first RF stage

B. After the first RF stage

C. After several stages of amplification

D. None of the above