JEE Main 2023PhysicsCommunication SystemMediumMCQ

JEE Main 2023 — Communication System Question with Solution

JEE Main 2023 (01 Feb Shift 2)

Question

In an amplitude modulation, a modulating signal having amplitude of X V is superimposed with a carrier signal of amplitude Y V in first case. Then, in second case, the same modulating signal is superimposed with different carrier signal of amplitude 2Y V. The ratio of modulation index in the two case respectively wil be :

Choose an option

Show full solutionCorrect option: C
Correct answer
C2 : 1

Step-by-step explanation

Modulating index is stated as μ=AmAc, where, Am=amplitude of modulating signal and Ac=amplitude of carrier signal.

Now, for first case, μ1=XY

For second case, μ2=X2Y

Thus, the ratio of μ1μ2=XYX2Y=21⇒μ1:μ2=2:1

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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.