JEE Main 2019PhysicsMagnetic Effects of CurrentMediumMCQ

JEE Main 2019 — Magnetic Effects of Current Question with Solution

JEE Main 2019 (10 Apr Shift 1)

Question

Two wires A &  B are carrying currents I1 and I2 as shown in the figure. The separation between them is  d . A third wire C carrying a current I is to be kept parallel to them at a distance x from A such that the net force acting on it is zero. The possible values of x are:

Choose an option

Show full solutionCorrect option: A
Correct answer
Ax=±I1dI1-I2

Step-by-step explanation

As current in A and B are opposite in direction, net force on C can never be zero if it is kept between
A and B .

∴ μ0I1I2πx=μ0I I22πx±d
I1x±d=I2 x
I2-I1x=± I1 d
x=±I1 dI2-I1

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About this question

This is a previous-year question from JEE Main 2019, 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.