JEE Main 2021PhysicsCommunication SystemEasyNumerical

JEE Main 2021 — Communication System Question with Solution

JEE Main 2021 (25 Jul Shift 2)

Question

A message signal of frequency 20 kHz and peak voltage of 20 V is used to modulate a carrier wave of frequency 1 MHz and peak voltage of 20 V. The modulation index will be:

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Correct answer
1

Step-by-step explanation

Modulation index

μ=AmAc=2020=1

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About this question

This is a previous-year question from JEE Main 2021, 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.