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.
Students who are searching for NCERT MCQ Questions for Class 12 Communication Systems with Answers are compiled here to get good practice on all fundamentals. Know your preparation level on MCQ Questions for Class 12 Communication Systems with Answers. You can also verify your answers from our provided MCQ Class 12 Communication Systems with Answers. So, ace up your preparation with MCQ of Class 12 Physics Examinations.
MCQ Questions Class 12 Communication Systems with Answers - Set - 1
Question 1:Â
Which of the following is invariably found on all communication satellites as a payload
(a) transponder
(b) photographic camera
(c) optical telescope
(d) None of these
Correct Answer – (A)
Question 2 :Â
For television transmission, the frequency employed is normally in the range
(a) 30-300 Hz
(b) 30-300 kHz
(c) 30-300 MHz
(d) 30-300 GHz.
Correct Answer – (C)
Question 3 :Â
The most commonly employed analog modulation technique in satellite communication is the
(a) amplitude modulation
(b) frequency modulation
(c) phase modulation
(d) All of the above.
Correct Answer – (B)
Question 4 :Â
Digital signals:
(a) represent values as discrete steps.
(b) utilise binary code system.
(c) do not provide a continuous set of values.
(d) All of these.
Correct Answer – (D)
Question 5 :Â
In amplitude modulation
(a) the amplitude of the carrier remains constant.
(b) the amplitude of the carrier varies in accordance with the amplitude of the modulating signal.
(c) the amplitude of carrier varies in accordance with the frequency of the modulating signal.
(d) None of these.
Correct Answer – (B)
MCQ Questions Class 12 Communication Systems with Answers
Question 6 :Â
Which one of the following can happen to the electromagnetic waves travelling in free space:
(a) Reflection
(b) Refraction
(c) absorption
(d) attenuation
Correct Answer – (D)
Question 7 :Â
Satellite transponders
(a) use a high frequency for reception and a lower frequency for retransmission of information to and from earth
(b) use a lower frequency for reception and a higher frequency for retransmission of information to and from earth.
(c) Use a single frequency for reception and retransmission of information to and from earth.
(d) none of the above.
Correct Answer – (A)
Question 8 :Â
Modulation index in an FM signal:
(a) Varies directly as the modulating frequency.
(b) Varies directly as frequency deviation and inversely as the modulating frequency.
(c) varies inversely as the frequency deviation. ‘
(d) None of these.
Correct Answer – (B)
Question 9 :Â
In modulation process, radio frequency wave is termed as
(a) modulating wave
(b) modulated wave
(c) carrier wave
(d) none
Correct Answer – (C)
Question 10 :Â
Modulation index of an AM signal:
(a) depends upon the peak amplitude of the modulating signal and the carrier.
(b) depends upon the peak amplitude of modulating signal.
(c) is a function of carrier frequency.
(d) None of these.
Correct Answer – (A)
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