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MCQ Practice Question

Communication Systems Frequency Modulation

An FM signal has frequency deviation 20 kHz and modulating frequency 10 kHz. Using Carson’s rule, its approximate bandwidth is?

A20 kHz
B40 kHz
C60 kHz
D80 kHz

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Correct Answer: C. 60 kHz

Explanation: Carson's rule gives B≈2(Delta f+fm)=2(20+10)=60 kHz.

Reference: Standard communication systems: Carson rule numerical

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