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 - 2
Question 1:
The velocity of electromagnetic wave is:
(a) 3 × 105 ms-1
(b) 3 × 106 ms-1
(c) 3 × 108 ms-1
(d) 3 × 1010 ms-1
Correct Answer – (C)
Question 2 :
Who undertook the first space walk and in which year?
(a) Leonov 1965
(b) Neil Armstrong, 1969
(c) Rakesh Sharma. 1998
(d) None of these
Correct Answer – (A)
Question 3 :
The maximum distance upto which T.V. signals can be received from an antenna of height h is
(a) √(2hR)
(b) h√(2R)
(c) R√(2h)
(d) None of these
Correct Answer – (A)
Question 4 :
Audio signals have frequency range.
(a) 20 Hz to 20 kHz
(b) 20 kHz to 20 MHz
(c) 20 MHz to 20 GHz
(d) All of these.
Correct Answer – (A)
Question 5 :
Microwave link repeaters are typically 50 km apart,
(a) because of atmospheric attenuation.
(b) because of the earth’s curvature.
(c) to ensure that signal voltage may not harm the repeater.
(d) None of these.
Correct Answer – (B)
MCQ Questions Class 12 Communication Systems with Answers
Question 6 :
The term used “to collect the information about an object and a place without physical contact” is called :
(a) modulation
(b) communication
(c) amplification
(d) remote sensing
Correct Answer – (D)
Question 7 :
The information bearing signal is called
(a) Base band signal
(b) digital signal
(c) Analog signal
(d) None of these
Correct Answer – (A)
Question 8 :
The numbers of geostationary satellites needed for uninterrupted global coverage is
(a) 3
(b) 4
(c) 2
(d) 1
Correct Answer – (A)
Question 9 :
Optical communication uses the frequency range of
(a) 109 to 1010 Hz
(b) 105 to 106 Hz
(c) 1014 to 1015 Hz
(d) 1016 to 1017 Hz.
Correct Answer – (C)
Question 10 :
An antenna is
(a) capacitive
(b) reactive
(c) inductive above its resonance frequency.
(d) None of these
Correct Answer – (C)
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