JEE Main 2024PhysicsMagnetic Effects of CurrentMediumNumerical

JEE Main 2024 — Magnetic Effects of Current Question with Solution

JEE Main 2024 (30 Jan Shift 1)

Question

The horizontal component of earth's magnetic field at a place is 3.5×10-5 T. A very long straight conductor carrying current of 2 A in the direction from South east to North West is placed. The force per unit length experienced by the conductor is ________×10-6 N m-1.

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Show full solutionCorrect answer: 35
Correct answer
35

Step-by-step explanation

Horizontal component of magnetic field, BH=3.5×10-5 T

Force acting on wire, F=ilBsinθ, where i=2 A

Therefore, Fl=iBsinθ=2×3.5×10-5×12

=35×10-6 N m-1

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About this question

This is a previous-year question from JEE Main 2024, 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.