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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 15
36.
In a wave the electric field lines are vertical. Then the wave is
horizontally polarized
vertically polarized
either (a) or (b)
neither (a) nor (b)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
For an RC low pass filter, the relation between noise bandwidth BN and 3-dB bandwidth B3dB is
BN = B3-dB
BN = p B3-dB
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
In FM and AM the ratio of signal to noise ratio at the detector output least depends upon
bandwidth
transmission
carrier frequency
modulating frequency
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.
Which of the following can provide two or more voice circuits with the same carrier?
SSB
Carrier reinsertion
Lincompex
Independent side band system
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
A linear diode detector uses RC filter. As modulation index increases the maximum permissible value of time constant RC
increases
decreases
remains constant
either (a) or (c)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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