JEE Main 2022PhysicsMagnetic Effects of CurrentMediumNumerical

JEE Main 2022 — Magnetic Effects of Current Question with Solution

JEE Main 2022 (29 Jul Shift 1)

Question

A wire of length 314 cm carrying current of 14 A is bent to form a circle. The magnetic moment of the coil is A-m2. [Given π=3.14]

Enter your answer

Show full solutionCorrect answer: 11
Correct answer
11

Step-by-step explanation

Length of the wire l when bent becomes circumference of the loop, whose radius is given by R=l2π=3141002×3.14=12 m

Magnetic moment of the coil is M=IA

=14×πR2

=14×3.14×14

=10.99≈11.00 A-m2

Practice this on the real CBT interface

Solve this JEE Main question (and the rest of the Magnetic Effects of Current chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.

Solve interactively →

About this question

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