A. 50 kW
B. 5 kW
C. 8 kW
D. 25 kW
Modulation and Demodulation
The signal voltage induced in the aerial of a radio receiver is of the order of_____________?
A. mV
B. µV
C. V
D. None of the above
In superhetrodyne receiver, the input at mixer stage is________________?
A. IF and RF
B. RF and AF
C. IF and AF
D. RF and local oscillator signal
Overmodulation (amplitude) occurs when signal amplitude is _____________ carrier amplitude?
A. Equal to
B. Greater than
C. Less than
D. None of the above
In an AM wave useful power is carrier by ______________?
A. Carrier
B. Sidebands
C. Both sidebands and carrier
D. None of the above
The signal voltage induced in the aerial of a radio receiver is of the order of ________________?
A. mV
B. µV
C. V
D. None of the above
In radio transmission, the medium of transmission is ________________?
A. Space
B. An antenna
C. Cable
D. None of the above
At 100% modulation, the power in each sideband is _____________ of that of carrier?
A. 50%
B. 40%
C. 60%
D. 25%
In a radio receiver, we generally use ………….. oscillator as a local oscillator
A. Crystal
B. Wien-bridge
C. Phase-shift
D. Hartley
The letters AVC stand for ________________?
A. Audio voltage control
B. Abrupt voltage control
C. Automatic volume control
D. Automatic voltage control
