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 - 5
Question 1:
The AM wave is equivalent to the summation of
(a) two sinusoidal waves
(b) three sinusoidal waves
(c) four sinusoidal waves
(d) None of these
Correct Answer – (B)
Question 2 :
During ground wave propagation the transmitted waves gets attenuated because
(a) earth surface absorbs the waves
(b) frequency of the waves are too low
(c) energy content of these waves are high
(d) earth surface offers resistance.
Correct Answer – (D)
Question 3 :
The term channel is used to indicate
(a) the amplitude range allocated to a given source
(b) the frequency range allocated to a given source
(c) the voltage-range allocated to a given source
(d) All of the above
Correct Answer – (B)
Question 4 :
Which of the following is the element of a communication system?
(a) Transmitter
(b) channel
(c) Receiver
(d) All of the above
Correct Answer – (D)
Question 5 :
Increase in frequency deviation results into:
(a) increase in noise of FM receiver
(b) decrease in noise of AM receiver
(c) increase in noise of Am receiver
(d) decrease in noise of FM receiver
Correct Answer – (B)
MCQ Questions Class 12 Communication Systems with Answers
Question 6 :
Wave obtained on superimposition of audible frequency e.m. wave is known as
(a) carrier wave
(b) high frequency wave
(c) modulating wave
(d) modulated wave
Correct Answer – (D)
Question 7 :
Buffer amplifier is used at the transmitting end to
(a) feed carrier frequency to master oscillator
(b) amplify carrier frequency
(c) mix modulating signal with carrier frequency
(d) isolate master oscillator from other stages of transmitter.
Correct Answer – (D)
Question 8 :
A transducer used at the transmitting end, serves the purpose of converting
(a) electrical signal to sound form
(b) sound signal to electrical form
(c) electrical signal to magnetic form
(d) sound signal to magnetic form
Correct Answer – (B)
Question 9 :
Communication is the process of
(a) keeping in touch
(b) exchange information
(c) broad casting
(d) entertainment by electronics
Correct Answer – (B)
Question 10 :
Digital signals:
(a) deal with all sort of values
(b) can use decimal system
(c) can use binary system
(d) (b) and (c) both
Correct Answer – (D)
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