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The modulation index is

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The modulation index is

(a) 20

(b) 4

(c) 0.2

(d) 10

The question was posed to me by my college professor while I was bunking the class.

This intriguing question comes from Amplitde Modulation topic in portion EDC Overview of Electronic Devices & Circuits

1 Answer

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Correct option is (c) 0.2

Explanation: 20 + 4sin(500πt) = 20(1 + 0.2sin(500πt)), hence the modulation index is 0.2.

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