JEE Main 2021PhysicsMagnetic Effects of CurrentMediumMCQ

JEE Main 2021 — Magnetic Effects of Current Question with Solution

JEE Main 2021 (25 Feb Shift 2)

Question

An electron with kinetic energy K1 enters between parallel plates of a capacitor at an angle α with the plates. It leaves the plates at angle β with kinetic energy K2. Then the ratio of kinetic energies K1:K2 will be :

Choose an option

Show full solutionCorrect option: D
Correct answer
Dcos2βcos2α

Step-by-step explanation

velocity along the plate will not change.

∴ v1cosα=v2cosβ

K1 K2⇒v12v22=cos2βcos2α

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About this question

This is a previous-year question from JEE Main 2021, covering the Magnetic Effects of Current 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.