MHT CET 2026 Physics question
A circular arc of wire of radius of curvature 'r' subtends an angle of radian at its centre. If current 'i' is flowing in it then the magnetic induction at its centre is ( =permeability of free space)
Answer: (D)
Solution
A full circular loop gives at the centre, which corresponds to an angle . The field is proportional to the angle subtended, so for an arc of angle : . With : \frac${μ_0
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