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Question

An amplitude modulated wave has 800W of total power content. For 100% modulation the carrier should have power content equal to

A
50 W
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B
100 W
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C
2000 W
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D
200 W
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Solution

The correct option is C 2000 W
Power of transmitted AM wave Pt=xW
Power of carrier wave Pc after modulation =800W
Modulation m=100%
Pt=Pc(1+m22)
x=800(1+12)
x=800×32
x=1200
Total power of carrier wave =1200+800=2000W
Hence,
option (C) is correct answer.


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