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Q.

Amplitude modulated wave is represented by VAM=10[1+0.4cos(2π×104t)]cos(2π×107t).The total bandwidth of the amplitude modulated wave in kHz is:

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answer is 20.

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Detailed Solution

ωm=2π×104

fm=wm2π=104π=10KHz

 Band width = 2fm

=2×10=20KHz

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Amplitude modulated wave is represented by VAM=10[1+0.4cos(2π×104t)]cos(2π×107t).The total bandwidth of the amplitude modulated wave in kHz is: