A. Thrice
B. Four times
C. Twice
D. None of the above
Related Mcqs:
- If modulation is 100% then signal amplitude is ____________arrier amplitude?
A. Equal to
B. Greater than
C. Less than
D. None of the above - Overmodulation (amplitude) occurs when signal amplitude is _____________ carrier amplitude?
A. Equal to
B. Greater than
C. Less than
D. None of the above - In amplitude modulation, the _____________of carrier is varied according to the strength of the signal?
A. Amplitude
B. Frequency
C. Phase
D. None of the above - 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 - 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 - A 100 V carrier is made to vary between 160 V and 40 V by the signal. What is the modulation factor ?
A. 3
B. 6
C. 5
D. None of the above - 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 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 - Over modulation results in ______________?
A. Weakening of the signal
B. Excessive carrier power
C. Distortion
D. None of the above - As the modulation level is increased, the carrier power__________________?
A. Is increased
B. Remains the same
C. Is decreased
D. None of the above
