JEE Main 2022 · 29 Jul · Shift 1 · Physics Q56

← JEE Main 2022 · 29 Jul · Shift 1

PhysicsInteger+4 / -1Question 56 of 90

A closely wounded circular coil of radius 5 cm produces a magnetic field of $37.68\times10^{-4}$ T at its center. The current through the coil is _______ A.

[Given, number of turns in the coil is 100 and π = 3.14]

Your answer

Answer and worked solution

Official answer: 3

Coil centre. $B=\dfrac{\mu_0NI}{2r}$ , so $I=\dfrac{2\times0.05\times37.68\times10^{-4}}{4\pi\times10^{-7}\times100}=3$ A.

Answer: 3

Topics:Biot-Savart law

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JEE Main 2022 · 29 Jul · Shift 1, Physics question 56