Electronics Communication Objective Questions & Answers Pdf - 1

Question: 1

Loudspeaker converts

(A) sound signal into audio electrical signal

(B) light energy into electromagnetic energy

(C) electrical energy into electromagnetic energy

(D) audio electrical signal into sound signal

Question: 2

The efficiency of amplitude modulation is

(A) zero

(B) low

(C) high

(D) 100%

Question: 3

Audio signals are carried by

(A) low frequency radiowaves

(B) voice frequencies

(C) medium frequency radiowaves

(D) high frequency radiowaves

Question: 4

In amplitude frequency lies in the audio range

(A) four times the signal frequency

(B) thrice the signal frequency

(C) twice the signal frequency

(D) equal to the signal frequency

Question: 5

The process of modulation is carried out in

(A) oscillator circuit

(B) amplifier circuit

(C) resonant circuit

(D) modulator circuit