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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 20
11.

Assertion (A): The unit of telephone traffic measurement is erlang.

Reason (R): International circuits for communication are fitted with echo suppressors.

Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is correct but R is wrong
A is wrong but R is correct
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
In a single sideband suppressed carrier AM system, the modulation index is changed from 0 to 1, the power content of the signal
will be quarter
will be doubled
will increase by 50 percent
will increase by 25 percent
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
The primary colours are
blue and green
blue and red
red and green
blue, red and green
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
The most commonly used system of modulating for telegraphy is
single tone modulation
on-off keying
frequency shift keying
pulse code modulation
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
Which of the following antennas is not wide band?
Marconi
Helical
Folded dipole
Discone
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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