JEE Main 2021PhysicsElectromagnetic WavesEasyMCQ

JEE Main 2021 — Electromagnetic Waves Question with Solution

JEE Main 2021 (01 Sep Shift 2)

Question

There are two infinitely long straight current-carrying conductors and they are held at right angles to each other so that their common ends meet at the origin as shown in the figure given below. The ratio of current in both conductors is 1:1. The magnetic field at point P is_________.

Choose an option

Show full solutionCorrect option: C
Correct answer
Cμ0I4πxyx2+y2+(x+y)

Step-by-step explanation

B=μ0I4πy1+sinθ1+μ0I4πx1+sinθ2
B=μ0I4πy1+xx2+y2+μ0I4πx1+yx2+y2

B=μ0I4πx+μ0I4πy+μ0I4πxyx2+y2+yxx2+y2⇒B=μ0I4π1x+1y+μ0I4πx2+y2xy=μ0I4πx+y+x2+y2xy

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About this question

This is a previous-year question from JEE Main 2021, covering the Electromagnetic Waves 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.