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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 9
31.
For demodulating PCM; it is first converted into
PDM
PPM
PWM
PAM
Answer: Option
Explanation:
No answer description is available. Let's discuss.
32.
One of the advantages of base modulation over collector modulation in a class C transistor amplifier is
higher efficiency
more linear operation
more power output per transistor
lesser requirement of modulating power
Answer: Option
Explanation:
No answer description is available. Let's discuss.
33.
In an AM transmitter after the modulation stage, class C amplifier
can be used
cannot be used
may be used, but it has no use
can't be determine to use
Answer: Option
Explanation:
No answer description is available. Let's discuss.
34.
The maximum number of AM broadcast stations that can be accommodated in a 100 kHz bandwidth for the highest modulating frequency of 5 kHz will be
100
20
10
1
Answer: Option
Explanation:
No answer description is available. Let's discuss.
35.
For a short dipole having an effective length less than half the wavelength the radiation resistance is
proportional to length
proportional to square root of length
proportional to square of length
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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