
Amplitude modulation power calculations
Authored by Monika Ingale
Engineering
University
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
An AM transmitter has a carrier power Pc=200 W and modulation index m=0.6. The total transmitted power is:
272 W
236 W
248 W
212 W
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which statement about AM power distribution is true?
Total sideband power is always greater than carrier power for m ≤ 1
Sidebands share power equally
Reducing m increases total transmitted power
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is AM transmission considered inefficient in terms of power usage?
Because the carrier contains no information but consumes most of the power
Because sidebands have unequal power
Because m is always less than 1
Because bandwidth is too large
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If the carrier is removed entirely, but both sidebands are transmitted, the resulting system is:
Standard AM
SSB
DSB-SC
FM
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In standard AM, most of the transmitted power is in:
The Carrier
The upper sideband
The lower Sideband
Equally shared between sidebands and carrier
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In AM, sideband power is proportional to:
m
m2
m3
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If μ is too small (close to zero) in AM, which is the main drawback?
Power efficiency is low because most power is wasted in carrier
Bandwidth becomes too large
Sidebands dominate and cause interference
Phase distortion occurs
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