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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 13
16.
The minimum viewing angle of resolution of human eye is (D is iris opening and λ is wavelength of light)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
In FM,
there is a large decrease in noise and hence increase in the signal to noise ratio
there is a large increase in noise and hence decrease in the signal to noise ratio
there is a large increase in noise and hence increase in the signal to noise ratio
there is a large decrease in noise and hence decrease in the signal to noise ratio
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
The power density spectrum of noise voltage of resistor R can be expressed as
2 kTR
1 kTR
0.5 kTR
0.25 kTR
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
If k denotes Boltzmann's constant, the rms value of thermal noise voltage is proportional to
k2
k
k
(k)1/3
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
The output of a battery eliminator is about
110 V DC
110 V AC
45 V DC
6 V DC
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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