JEE Main 2021PhysicsCommunication SystemMediumMCQ

JEE Main 2021Communication System Question with Solution

JEE Main 2021 (17 Mar Shift 2)

Question

A carrier signal C(t)=25sin2.512×1010t is amplitude modulated by a message signal m(t)=5sin1.57×108t and transmitted through an antenna. What will be the bandwidth of the modulated signal ?

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Show full solutionCorrect option: D
Correct answer
D50MHz

Step-by-step explanation

Band width =2fm

ωm=1.57×108=2πfm

BW=2fm=1082 Hz=50MHz

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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.