10 Question-Answer on communication system
1. Basically, a communication system is a
(a) Transmitter
(b) Receiver
(c) Messenger
(d) None of these
Ans: (c)
2. Present day communication system are
(a) Electrical
(b) Electronic
(c) Optical
(d) All of the above
Ans: ( d)
3. Major parts of a communication system are
(a) Transmitter and receiver
(b) Receiver and communication channel
(c) Transmitter and communication channel
(d) Transmitter, receiver and communication channel
Ans: (d)
4. A transmitter transmits the message in original
(a) True
(b) False
(c) Sometimes true and sometimes false
(d) Never true
Ans: (d)
5. Communication channel consists of
(a) Transmission line
(b) Optical fiber
(c) Free space
(d) All of the above
Ans: ( d)
6. A receiver reconstructs the original message after propagation through the channel
(a) May be true
(b) May be false
(c) May be true or false
(d) Is certainly true
Ans: (d)
7. Basic components of a transmitter are
(a) Message signal generator and antenna
(b) Modulator and antenna
(c) Signal generator and modulator
(d) Message signal generator, modulator and antenna
Ans: (d)
8. A microphone converts
(a) Sound signals into electrical signals
(b) Electrical signals into sound signals
(c) Both (a) and (b) above
(d) Neither (a) nor (b)
Ans: (a)
9. Loud speaker converts
(a) Electrical signals into sound signals
(b) Sound signals into electrical signals
(c) Both (a) and (b) above
(d) Neither (a) nor (b)
Ans: ( a)
10. Oscillator crystal is made of
(a) Silicon
(b) Quartz
(c) Germanium
(d) Diamond
Ans: (b)