CBSE Class 12 Communication Systems Multiple Choice Questions with Answers. MCQ Questions Class 12 Communication Systems with Answers Is Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 12 Communication Systems MCQs with Answers to know their preparation level.
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MCQ Questions Class 12 Communication Systems with Answers - Set - 4
Question 1:
Digital signals:
(a) represents values as discrete steps
(b) Do not represents values as discrete steps
(c) represent values steps
(d) represent random steps
Correct Answer – (A)
Question 2 :
Communication channel consists of:
(a) transmission line only
(b) optical fibre only
(c) free space only
(d) All of the above
Correct Answer – (D)
Question 3 :
The output of a digital computer is an example of:
(a) digital signal
(b) analog signal
(c) both (a) and (b) above
(d) neither (a) nor (b)
Correct Answer – (A)
Question 4 :
The length of a half wave dipole at 30 mega-hertz is:
(a) 5 m
(b) 10 m
(c) 25 m
(d) 80 m
Correct Answer – (A)
Question 5 :
A loudspeaker converts:
(a) electrical signals into sound signals
(b) sound signals into electrical signals
(c) both (a) and (b)
(d) neither (a) nor (b)
Correct Answer – (A)
MCQ Questions Class 12 Communication Systems with Answers
Question 6 :
AM is used for broadcasting because:
(a) it is more noise immune than other modulation system
(b) it requires less transmitting power compare with other systems
(c) its use avoids receiver complexity
(d) No other modulation system can provide the necessary bandwidth faithful transmission
Correct Answer – (C)
Question 7 :
Which is more advantageous?
(a) analog data communication
(b) digital data communication
(c) both (a) and (b) are equally good
(d) depends on the situation
Correct Answer – (B)
Question 8 :
In space communication, the sound waves can be sent from one place to another:
(a) through space
(b) through wires
(c) by superimposing it on undamped electro-magnetic waves
(d) by superimposing it on damped electro-magnetic waves
Correct Answer – (C)
Question 9 :
The sound produced by a tuning fork is a sort of:
(a) analog signal
(b) digital signal
(c) both (a) and (b)
(d) neither (a) nor (b)
Correct Answer – (A)
Question 10 :
A microphone converts:
(a) sound signals into electrical signals
(b) electrical signals into sound signals
(c) both (a) and (b)
(d) Neither (a) nor (b)
Correct Answer – (A)
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