JEE Main 2019PhysicsCommunication SystemEasyMCQ

JEE Main 2019 — Communication System Question with Solution

JEE Main 2019 (12 Jan Shift 1)

Question

A 100V carrier wave is made to vary between 160 V and 40 V by a modulating signal. What is the modulation index?

Choose an option

Show full solutionCorrect option: B
Correct answer
B0.6

Step-by-step explanation

AC=100

AC+Am=160

AC-Am=40

AC=100,Am=60

μ=AmAc=0.6

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About this question

This is a previous-year question from JEE Main 2019, 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.