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JEE Main 2024 · PhysicsNumerical answerNumerical valueEasyCalculation

JEE Main 30 January 2024, Shift 2, Physics Q57

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

The current of 5A flows in a square loop of sides

1\ m

is placed in air. The magnetic field at the centre of the loop is

X\sqrt{2}\times 10^{-7}\ T

. The value of

X

is ________.

Official answer

40

NTA final key.

Chapter: Moving Charges and Magnetism
Topic: Biot-Savart Law
Idea tested: Field at Center of Regular Polygon

Same idea in other shifts

Asked 2× in all

8 Apr 2025, Shift 2 · Q39Figure shows a current carrying square loop ABCD of edge length is 'a' lying in a plane. If the resistance of the ABC part is r and that…HardDiagram basedHas a figure

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 42 of the 174 JEE Main shifts held from 2017 to 2026.