Exercise: Communication Systems

Questions for: Communication Systems

For AM receivers the standard IF frequency is
A:
106 kHz
B:
455 kHz
C:
1.07 MHz
D:
10.7 MHz
Answer: B
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The modulation index of an FM is changed from 0 to 1. How does the transmitted power change?
A:
Gets halved
B:
Gets doubled
C:
Gets increased by 50 percent
D:
Remains unchanged
Answer: C
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In a TV receiver antenna the length of reflector rod
A:
is the same as that of dipole
B:
is less than that of dipole
C:
is more than that of dipole
D:
may be equal, more or less than that of dipole
Answer: C
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Full duplex operation-permits transmission in both directions at the same time.
A:
True
B:
False
C:
D:
Answer: A
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The direction of rotation of a CD is
A:
clockwise
B:
anticlockwise
C:
clockwise or anticlockwise depending on frequency of data stored
D:
mostly anticlockwise but some times clockwise
Answer: B
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