A. Amplitude
B. Frequency
C. Phase
D. Both phase and frequency
Related Mcqs:
- In a radio receiver, noise is generally developed at _______________?
A. IF stage
B. Receiving antenna
C. Audio stage
D. RF stage - In amplitude modulation, bandwidth is ____________ the audio signal frequency?
A. Thrice
B. Four times
C. Twice
D. None of the above - Modulation is done in____________________
A. Transmitter
B. Radio receiver
C. Between transmitter and radio receiver
D. None of the above - In a transmitter ____________oscillator is used?
A. Hartley
B. RC phase-shift
C. Wien-bridge
D. Crystal - Demodulation is done in ________________?
A. Receiving antenna
B. Transmitter
C. Radio receiver
D. Transmitting antenna - When the modulating signal controls the frequency of the carrier, we get______________?
A. Phase modulation
B. Amplitude modulation
C. Frequency modulation
D. May be any one 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 - A 50 kW carrier is to be amplitude modulated to a level of 85%. What is the carrier power after modulation ?
A. 50 kW
B. 5 kW
C. 8 kW
D. 25 kW - Modulation refers to a low-frequency signal controlling the ________________?
A. Amplitude of the carrier
B. Frequency of the carrier
C. Phase of the carrier
D. May be any 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
