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Question
A signal of 5 kHz frequency is amplitude modulated on a carrier wave of frequency 2 MHz. The frequencies of the resultant signal is/are :
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Solution
fR = fC + fm = 2000 kHz + 5kHz = 2005 kHz
fR = fC - fm = 2000 kHz - 5kHz = 1995 kHz
So, frequency content of resultant wave will have frequencies 1995 kHz, 2000 kHz and 2005 kHz