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JEE Main 2022 · 28 Jul · Shift 2, Physics question 20

A FM Broad cast transmitter, using modulating signal of frequency 20 kHz has a deviation ratio of 10. The Bandwidth required for transmission is:

Choose one option
Answer and worked solution

Official answer: D

Carson's rule. Δf=10×20=200\Delta f=10\times20=200 kHz, bandwidth 2(200+20)=4402(200+20)=440 kHz.

(D)

Topics:Modulation
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