JEE Main 2024 · PhysicsNumerical answerNumerical valueMediumMulti-step

JEE Main 31 January 2024, Shift 2, Physics Q57

Question 57 of 90 in this shift, Physics question 27 of 30, Section B.

Two circular coils

P

and

Q

of 100 turns each have same radius of

\pi

cm. The currents in

P

and

R

are

1A

and

2A

respectively.

P

and

Q

are placed with their planes mutually perpendicular with their centers coincide. The resultant magnetic field induction at the center of the coils is

\sqrt{x}

mT, where

x=

____________. [Use

\mu_0=4\pi\times10^{-7}\ TmA^{-1}

]

Official answer

NTA final key.

Chapter: Moving Charges and Magnetism
Topic: Biot-Savart Law
Idea tested: Field at center of circular arc

Same idea in other shifts

Asked 8× in all

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Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.