JEE Main 2023PhysicsCommunication SystemEasyMCQ

JEE Main 2023 — Communication System Question with Solution

JEE Main 2023 (24 Jan Shift 1)

Question

A modulating signal is a square wave, as shown in the figure.

If the carrier wave is given as ct=2sin8πt volts, the modulation index is:

Choose an option

Show full solutionCorrect option: D
Correct answer
D12

Step-by-step explanation

Modulation index 'μ' is related to amplitude of modulation signal 'Am' and amplitude of carrier wave 'Ac' as:

μ=AmAc

Now, from graph Am=1 V and from equation of carrier wave Ac=2 V. Therefore,

μ=12.

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About this question

This is a previous-year question from JEE Main 2023, 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.