JEE Main 2023PhysicsCommunication SystemMediumMCQ

JEE Main 2023 — Communication System Question with Solution

JEE Main 2023 (30 Jan Shift 1)

Question

A sinusoidal carrier voltage is amplitude modulated. The resultant amplitude modulated wave has maximum and minimum amplitude of 120 V and 80 V respectively. The amplitude of each side band is :

Choose an option

Show full solutionCorrect option: B
Correct answer
B10 V

Step-by-step explanation

Given here, 

Ac+Am=120    ...1

Ac-Am=80    ...2

From equation 1 and 2, we have

2Ac=200⇒Ac=100 V and Am=20 V

Modulation index μ=20100=15

Amplitude of each side band

=Acμ2

=100×110=10 volt

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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.