JEE Main 2017PhysicsMagnetic Effects of CurrentEasyMCQ

JEE Main 2017 — Magnetic Effects of Current Question with Solution

JEE Main 2017 (08 Apr Online)

Question

A magnetic dipole in a uniform magnetic field has: (Take zero potential energy when magnetic dipole is perpendicular to magnetic field)

Choose an option

Show full solutionCorrect option: B
Correct answer
BZero potential energy when the torque is maximum

Step-by-step explanation

Torque, τ=MBsinθ

and potential energy, U=-MBcosθ

τ is maximum when θ=90o

U=-MBcos90o=0.

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About this question

This is a previous-year question from JEE Main 2017, 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.