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.Management Sciences
Category: Modulation and Demodulation
Man made noise are______________ variations?
A. Amplitude
B. Frequency
C. Phase
D. Both phase and frequency
If level of modulation is increased ______________ power is increased?
A. Carrier
B. Sideband
C. Carrier as well as sideband
D. None of the above
Demodulation is done in ________________?
A. Receiving antenna
B. Transmitter
C. Radio receiver
D. Transmitting antenna
As the modulation level is increased, the carrier power__________________?
A. Is increased
B. Remains the same
C. Is decreased
D. None of the above
Superhertodyne principle refers to_________________?
A. Using a large number of amplifier stages
B. Using a push-pull circuit
C. Obtaining lower fixed intermediate frequency
D. None of the above
If modulation is 100% then signal amplitude is ____________arrier amplitude?
A. Equal to
B. Greater than
C. Less than
D. None of the above
The function of ferrite antenna is to_________________?
A. Reduce stray capacitance
B. Stabilise d.c. bias
C. Increase the Q of tuned circuit
D. Reduce noise
The IF is 455 kHz. If the radio receiver is tuned to 855 kHz, the local oscillator frequency is _______________?
A. 455 kHz
B. 1310 kHz
C. 1500 kHz
D. 1520 kHz
In a radio receiver, noise is generally developed at _______________?
A. IF stage
B. Receiving antenna
C. Audio stage
D. RF stage
The major advantage of FM over AM is__________________?
A. Reception is less noisy
B. Higher carrier frequency
C. Smaller bandwidth
D. Small frequency deviation
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