A sinusoidal carrier voltage of frequency 1.5 MHz and amplitude 50V is amplitude modulated by sinusoidal voltage of frequency 10 kHz producing 50% modulation. The lower and upper side band frequencies in kHz are
Answer & explanation
Correct answer: option 1
Here, fc = 1.5 MHz = 1500 kHz,
fm = 10 kHz,
∴ Low side band frequency= fc – fm = 1500 kHz – 10 kHz= 1490 kHz
Uper sideband frequency = 1500 kHz + 10 kHz= 1510 kHz