JEE Main 2022PhysicsCommunication SystemEasyMCQ

JEE Main 2022 — Communication System Question with Solution

JEE Main 2022 (29 Jul Shift 1)

Question

Find the modulation index of an AM wave having 8 V variation where maximum amplitude of the AM wave is 9 V.

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Show full solutionCorrect option: A
Correct answer
A0.8

Step-by-step explanation

Modulation index is given by m=AmAc, where, Am is amplitude of modulating signal and Ac is amplitude of carrier signal.

Given: 2Am=8

Am+Ac=9⇒Ac=5

∴m=45=0.8

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About this question

This is a previous-year question from JEE Main 2022, covering the Communication System chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.