Exercise: Communication Systems

Questions for: Communication Systems

The most commonly used microphone for public address systems is
A:
carbon
B:
crystal
C:
moving coil
D:
condenser
Answer: C
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In TV broadcast, UHF range is
A:
606 - 790 MHz
B:
100 - 150 MHz
C:
41 - 68 MHz
D:
174 - 230 MHz
Answer: A
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Assertion (A): RF tuner is called front end of TV receiver

Reason (R): RF tuner receives the TV signal and selects the required channel.

A:
Both A and R are correct and R is correct explanation of A
B:
Both A and R are correct but R is not correct explanation of A
C:
A is correct but R is wrong
D:
A is wrong but R is correct
Answer: A
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An FM signal is modulated by an 8 kHz sine wave and has maximum and minimum frequencies of 100.05 MHz and 99.95 MHz respectively. Its deviation frequency is
A:
100 kHz
B:
100 MHz
C:
500 kHz
D:
108 kHz
Answer: D
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Limiter is not essential in the following detector
A:
foster-Seeley
B:
ratio detector
C:
balanced
D:
none of the above
Answer: B
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