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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 17
36.
Diffraction of EM waves
arises only with spherical wave front
may occur around the edge of an obstacle
occurs when waves pass through a big slot
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
The start of modern computer age was started by the event
development of disc drive
development of transistor
development of Hollerith code
design of EVIAC computer
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
At night D layer of ionosphere is absent.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.
Which of the following is not correct?
In SSB amplitude modulated system, the transmitter circuit has to be more stable leading to better reception
In SSB amplitude modulated system more channel space is available as compared to double sideband amplitude modulated system
In SSB amplitude modulated system the signal is more noise resistant as compared to double sideband system
An SSB-AM system requires lesser power (for the same signal strength) as compared to DSB-AM system
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.

Assertion (A): Data communication using digital data must be very accurate.

Reason (R): In analog signals redundancy is available but in digital signals redundancy is not available.

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.
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