A sinusoidal carrier voltage of 80 volts amplitude and 1 MHz frequency is amplitude modulated by a sinusoidal voltage of frequency 5 kHz producing 50% modulation. Calculate the amplitude of LSB and USB
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a
10 V , 20 V
b
20 V , 30 V
c
20 V , 20 V
d
30 V , 30 V
answer is C.
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Detailed Solution
Amplitude of both LSB and USB are equal and given by =mEc2=0.5 x 802=20 V