JEE Main 2023PhysicsCommunication SystemMediumMCQ

JEE Main 2023 — Communication System Question with Solution

JEE Main 2023 (13 Apr Shift 2)

Question

To radiate EM signal of wavelength λ with high efficiency, the antennas should have a minimum size equal to:

Choose an option

Show full solutionCorrect option: C
Correct answer
Cλ4

Step-by-step explanation

For efficient radiation and reception, the height of transmitting and receiving antennas should be comparable to a quarter of wavelength of the frequency used. So for efficient transmission of signals of wavelengths λ the minimum length of antenna should be λ4.

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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.