An infinite wire has a circular bend of radius a, and carrying a… | JEE Main 2025 Physics PYQ

MCQMediumJEE Main 2025 · 28 January, Shift 2Biot–Savart Law

An infinite wire has a circular bend of radius $a$ , and carrying a current $I$ as shown in the figure. The magnitude of the magnetic field at the origin $O$ of the arc is given by:

A wire forms a three-fourth circular arc centered at O with radius a, then extends horizontally to the right and also as a lower straight segment to infinity, with current directions marked on the arc and straight parts.

A
$\frac{\mu_0 I}{4 \pi a} \left( \frac{3\pi}{2} + 2 \right)$
B
$\frac{\mu_0 I}{2 \pi a} \left( \frac{\pi}{2} + 2 \right)$
C
$\frac{\mu_0 I}{4 \pi a} \left( \frac{3\pi}{2} + 1 \right)$
D
$\frac{\mu_0 I}{4 \pi a} \left( \frac{\pi}{2} + 1 \right)$

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