JEE Main 2018PhysicsCommunication SystemEasyMCQ

JEE Main 2018 — Communication System Question with Solution

JEE Main 2018 (16 Apr Online)

Question

A carrier wave of peak voltage 14 V is used for transmitting a message signal. The peak voltage of the modulating signal given to achieve a modulation index of 80% will be:

Choose an option

Show full solutionCorrect option: C
Correct answer
C11.2 V

Step-by-step explanation

Modulation index, m=AmAc⇒Am=0.8 ×14=11.2 V

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About this question

This is a previous-year question from JEE Main 2018, 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.