JEE Main 2022 · PhysicsNumerical answerNumerical valueEasyCalculation

JEE Main 29 July 2022, Shift 1, Physics Q56

Question 56 of 90 in this shift, Physics question 26 of 30, Section B.

A closely wounded circular coil of radius 5 cm produces a magnetic field of

37.68 \times 10^{-4}

T at its center. The current through the coil is __________ A. [Given, number of turns in the coil is 100 and

\pi

= 3.14]

Official answer

NTA final key.

Chapter: Moving Charges and Magnetism
Topic: Biot-Savart Law
Idea tested: Field of an N-Turn Flat Coil

Same idea in other shifts

Asked 4× in all

6 Apr 2026, Shift 1 · Q42A small cube of side 1 mm is placed at the centre of a circular loop of radius 10 cm carrying a current of 2 A. The magnetic energy stored…MediumSingle correct
25 Jul 2022, Shift 2 · Q32The electric current in a circular coil of 2 turns produces a magnetic induction $\mathrm{B_1}$ at its centre. The coil is unwound and is…MediumSingle correct
4 Aug 2021, Shift 2 · Q7The same current is passed through two identical conducting wires of the same length L. One of them, $\mathrm{w_1}$ , is bent in the form…EasySingle 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.