JEE Main 2024 · PhysicsNumerical answerNumerical valueMediumCalculation

JEE Main 1 February 2024, Shift 1, Physics Q57

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

A regular polygon of 6 sides is formed by bending a wire of length

4\pi

meter. If an electric current of

4\pi\sqrt{3}

A is flowing through the sides of the polygon, the magnetic field at the centre of the polygon would be

x \times 10^{-7}

T. The value of

x

is ________.

Official answer

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 5× in all

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30 Jan 2024, Shift 2 · Q57The 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…EasyNumerical value
31 Aug 2021, Shift 2 · Q17A current of 1.5 A is flowing through a triangle, of side 9 cm each. The magnetic field at the centroid of the triangle is : (Assume that…MediumSingle correct
3 Sep 2020, Shift 1 · Q13Magnitude of magnetic field (in SI units) at the centre of a hexagonal shape coil of side 10 cm, 50 turns and carrying current I (Ampere)…MediumSingle correct

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.