Let B₁ be the magnitude of magnetic field at the center of a circ… | JEE Main 2025 Physics PYQ

MCQEasyJEE Main 2025 · 2 April, Shift 1Biot–Savart Law

Let $B_1$ be the magnitude of magnetic field at the center of a circular coil of radius $R$ carrying current $I$ . Let $B_2$ be the magnitude of magnetic field at an axial distance $x$ from the center. For $x : R = 3 : 4$ , $\frac{B_2}{B_1}$ is:

A
$4 : 5$
B
$16 : 25$
C
$64 : 125$
D
$25 : 16$

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