JEE Main 2020PhysicsMagnetic Effects of CurrentMediumMCQ

JEE Main 2020 — Magnetic Effects of Current Question with Solution

JEE Main 2020 (02 Sep Shift 2)

Question

A wire carrying current I is bent in the shapeABCDEFA as shown, where rectangle ABCDA and ADEFA are perpendicular to each other. If the sides of the rectangles are of lengths a and b, then the magnitude and direction of magnetic moment of the loop ABCDEFA is :

Choose an option

Show full solutionCorrect option: A
Correct answer
A2abI along j^2+k^2

Step-by-step explanation

Loop ABCD

M→1=(abI)(k^)
For Loop DEFA M→2=(abI)(j^)
M→=M→1+M→2;M→=(abI)(j^+k^)
2abI along j^2+k^2.

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About this question

This is a previous-year question from JEE Main 2020, 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.