Audio sine waves of 3 kHz frequency are used to amplitude modulate a carrier signal of 1.5 MHz. Which of the following statements are true?
(a) The side band frequencies are 1506 kHz and 1494 kHz

(b) The bandwidth required for amplitude modulation is 6 kHz

(c) The bandwidth required for amplitude modulation is 3 MHz

(d) The side band frequencies are 1503 kHz and 1497 kHz

2 Views | Posted 4 months ago

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1 Answer

Answered by

alok kumar singh | Contributor-Level 10

4 months ago

This is a Multiple Choice Questions as classified in NCERT Exemplar

Answer- b, d

Explanation- w_m=3KHz

And w_c= 1.5MHz= 1500KHz

By using these two 1500 $?$ 3= 1503 and 1497

Bandwidth = 2w_m= 2 $\times 3$ = 6KHz

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