Class NEET 2026 ALL Q #1921
KNOWLEDGE BASED 4 Marks 2026 NTA-RE-NEET-2026 MCQ SINGLE
A current $I_{0}$ flows through a metallic circular loop of radius r as shown in the figure. Resistance of the segment ABC is half that of ADC. Magnitude of magnetic field at the centre O of the loop is: [Image Placeholder]
(A) $\frac{\mu_{0}I_{0}}{2\pi r}$
(B) $\frac{\mu_{0}I_{0}}{12r}$
(C) $\frac{\mu_{0}I_{0}}{4r}$
(D) $\frac{\mu_{0}I_{0}}{2r}$
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Correct Answer: B

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