Physics-
General
Easy
Question
Sinusoidal carrier voltage of frequency 1.5 MHz and amplitude 50 V is amplitude modulated by sinusiodal voltage of frequency 10 kHz producing 50% modulation. The lower and upper side-band frequencies in kHz are
- 1490, 1510
- 1510, 1490
The correct answer is: 1490, 1510
Here, f c = 1.5 MHz = 1500 kHz, fm = 10 kHz
\ Lower side band frequency
= f c = fm = 1500 kHz – 10 kHz = 1490 kHz
Upper side band frequency = f c + fm = 1500 kHz + 10 kHz = 1510 kHz
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