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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 24
31.
One of the advantages of base modulation over collector modulation of a transistor class C amplifier is
improved efficiency
better linearity
high power output per transistor
the lower modulating power requirement
Answer: Option
Explanation:
No answer description is available. Let's discuss.
32.
Full duplex operation-permits transmission in both directions at the same time.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
33.
In a TV receiver antenna the length of reflector rod
is the same as that of dipole
is less than that of dipole
is more than that of dipole
may be equal, more or less than that of dipole
Answer: Option
Explanation:
No answer description is available. Let's discuss.
34.
The modulation index of an FM is changed from 0 to 1. How does the transmitted power change?
Gets halved
Gets doubled
Gets increased by 50 percent
Remains unchanged
Answer: Option
Explanation:
No answer description is available. Let's discuss.
35.
For AM receivers the standard IF frequency is
106 kHz
455 kHz
1.07 MHz
10.7 MHz
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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