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MCQ Practice Question

Communication Systems Frequency Modulation

An FM signal has peak frequency deviation 75 kHz and maximum modulating frequency 15 kHz. Its modulation index beta is?

A0.2
B5
C15
D90

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Correct Answer: B. 5

Explanation: For FM, beta=Delta f/fm=75/15=5.

Reference: Standard communication systems: frequency modulation

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