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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 17
16.
The seven segment display used in watches and clocks generally uses
LED
LCD
Photodiode
FET
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
If e = 10 sin(108 t + 3 sin 104 t) then modulating frequency is
159 Hz
1590 Hz
1.59 MHz
15.9 MHz
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
When a signal is quantized such that the step size S is small in comparison with the peak to peak range of the signal, the mean square quantization error is equal to
S2
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.

Assertion (A): Many times a radar cannot detect 'grounding hopping' military aircraft.

Reason (R): Ground interference limits the range of radar.

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.
20.
Entropies associated with an extremely unlikely message and that with an extremely likely message are respectively
0 and 0
1 and 1
1 and 0
0 and 1
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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