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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