JEE Main 2022PhysicsCommunication SystemMediumMCQ

JEE Main 2022 — Communication System Question with Solution

JEE Main 2022 (29 Jun Shift 1)

Question

Only 2% of the optical source frequency is the available channel bandwidth for an optical communicating system operating at 1000 nm. If an audio signal requires a bandwidth of 8kHz, how many channels can be accommodated for transmission

Choose an option

Show full solutionCorrect option: B
Correct answer
B75×107

Step-by-step explanation

Frequency f=cλ=3×1081000×10-9=3×1014 Hz

Band width used for transmission =2100×3×1014 Hz=6×1012 Hz

Number of channels N=Total bandwidth of channel Bandwidth needed per channel =6×10128×103=6008×107=75×107

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About this question

This is a previous-year question from JEE Main 2022, 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.