JEE Main 2023PhysicsCommunication SystemMediumMCQ

JEE Main 2023 — Communication System Question with Solution

JEE Main 2023 (31 Jan Shift 1)

Question

The amplitude of 15sin(1000πt) is modulated by 10sin(4πt) signal. The amplitude modulated signal contains frequency (ies) of

(A) 500 Hz

(B) 2 Hz

(C) 250 Hz

(D) 498 Hz

(E) 502 Hz

Choose the correct answer from the options given below:

Choose an option

Show full solutionCorrect option: B
Correct answer
BA, D and E only

Step-by-step explanation

The frequency components of amplitude modulated signal are fc-fm, fc, fc+fm

Here, carrier wave frequency is

fc=100π2π=500 Hz

Modulating wave frequency is 

fm=4π2π=2 Hz

So, the frequencies in amplitude modulated signal are =498 Hz, 500 Hz, 502 Hz

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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.