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The modulation index is(a) 20(b) 4(c) 0.2(d) 10The 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

Answer»

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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