Physics · 2025
JEE Main · 2 April 2025, Shift 1 · Q38
Let B_1 be the magnitude of magnetic field at center of a circular coil of radius R carrying current I. Let B_2 be the magnitude of magnetic field at…
Let $\displaystyle \mathrm{B}_1$ be the magnitude of magnetic field at center of a circular coil of radius R carrying current I . Let $\displaystyle \mathrm{B}_2$ be the magnitude of magnetic field at an axial distance ' $\displaystyle x$ ' from the center. For $\displaystyle x: \mathrm{R}=3: 4, \frac{\mathrm{~B}_2}{\mathrm{~B}_1}$ is :
Official answer
From NTA’s final answer key for this paper.
(4)
$\displaystyle 64: 125$
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JEE Main 2025 Physics question, with the answer from NTA’s final answer key. Where our answers come from.