JEE Main 2020PhysicsCommunication SystemMediumMCQ

JEE Main 2020 — Communication System Question with Solution

JEE Main 2020 (02 Sep Shift 1)

Question

An amplitude modulated waves is represented by expression vm=51+0.6 cos 6280t sin211×104t V. The minimum and maximum amplitudes of the amplitudes modulated wave are, respectively:

Choose an option

Show full solutionCorrect option: B
Correct answer
B52V, 8V

Step-by-step explanation

From Given Equation

μ=0.6

Am=μAc

Amax+Amin2=Ac=5 V

Amax-Amin2=3 V

From Equation (1) + (2)

Amax=8 V

From Equation (1) – (2)

Amin=2 V

 

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About this question

This is a previous-year question from JEE Main 2020, 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.