JEE Main 2022PhysicsMagnetic Properties of MatterMediumNumerical

JEE Main 2022 — Magnetic Properties of Matter Question with Solution

JEE Main 2022 (27 Jun Shift 2)

Question

A metallic rod of length 20 cm is placed in North-South direction and is moved at a constant speed of 20 m s-1 towards East. The horizontal component of the Earth's magnetic field at that place is 4×10-3 T and the angle of dip is 45°. The emf induced in the rod is _____ mV.

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Show full solutionCorrect answer: 16
Correct answer
16

Step-by-step explanation

Emf produced is ε=BVL⊥v⊥

We know BVBH=tan45°, so BV=4×10-3 T

Then,  ε=4×10-3×20×10-2×20 =16 mV   

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About this question

This is a previous-year question from JEE Main 2022, covering the Magnetic Properties of Matter 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.