Generation of AM Waves MCQ’s

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This set of Analog Communication Multiple Choice Questions & Answers (MCQs) focuses on “Generation of AM Waves”.

1. What is the disadvantage of FM over AM?
a) high modulating power is needed
b) requires high output power
c) large bandwidth required
d) high noise is produced

2. For low level amplitude modulation, amplifier must be ________
a) Class C amplifier
b) Class B amplifier
c) Class D amplifier
d) class A amplifier

3. Which of the following devices is used to generate AM waves?
a) Square-law modulator
b) Reactance modulator
c) Transmitter
d) Transducer

4. Approximate range of a cordless telephone is ________
a) 900m
b) 100m
c) 1000m
d) 475m

5. Carrier wave carries information.
a) True
b) False

6. For 100% amplitude modulation, the power in upper sideband when carrier power is to be 100W?
a) 100W
b) 75W
c) 25W
d) 50W

7. A wave is modulated by two sin waves having modulation indices of 0.3 and 0.5. Find the total modulation index?
a) 0.1
b) 0.7
c) 0.58
d) 0.35

8. What can we do to eliminate distortion in the picture?
a) use a longer transmission line
b) change the antenna orientation
c) use a short transmission line
d) connect a booster

9. Modem is considered as high speed if data rate is ________
a) 10000
b) 20000
c) 5000
d) 30000

10. Scanning always takes place from ________
a) right to left
b) left to right
c) left to right for odd fields and right to left for even fields
d) left to right for even fields and right to left for odd fields

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