JEE Main 2023PhysicsCommunication SystemEasyMCQ

JEE Main 2023 — Communication System Question with Solution

JEE Main 2023 (31 Jan Shift 2)

Question

Given below are two statements

Statement I : For transmitting a signal, size of antenna (l) should be comparable to wavelength of signal (at least l =λ4 in dimension).

Statement II : In amplitude modulation, amplitude of carrier wave remains constant (unchanged).

In the light of the above statements, choose the most appropriate answer from the options given below

Choose an option

Show full solutionCorrect option: D
Correct answer
DStatement I is correct but Statement II is incorrect

Step-by-step explanation

In amplitude modulation frequency of carrier wave remains unchanged. Minimum size of antenna should be 14th of wavelength so that the antenna can sense the variations of the signal properly.

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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.