Communication Systems Quiz Questions and Answers - 1
Question: 1
Radio communication was first made possible by the invention of
(A) semiconductors devices
(B) IC chips
(C) transistors
(D) electronic valves
Ans: D
electronic valves
Question: 2
Modulation is a process of superimposing audio signal with
(A) low frequency waves
(B) high frequency waves
(C) medium frequency waves
(D) voice frequency waves
Ans: B
high frequency waves
Question: 3
Microphone converts
(A) electrical energy into electro-magnetic energy
(B) sound energy into light energy
(C) electrical energy into sound energy
(D) sound energy into electrical energy
Ans: D
sound energy into electrical energy
Question: 4
A television camera converts
(A) light energy into sound energy
(B) light energy into electrical energy
(C) mechanical energy into electrical energy
(D) mechanical energy into light energy
Ans: A
light energy into sound energy
Question: 5
Radar works on the principle of
(A) electromagnetic echoes
(B) video echoes
(C) radio echoes
(D) none of the above
Ans: C
radio echoes
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