MHT CET 2023 Physics question
A circular arc of radius 'r' carrying current 'I' subtends an angle at its center. The radius of a metal wire is uniform. The magnetic induction at the center of circular arc is [= permeability of free space]
Answer: (C)
Solution
For an arc of radius subtending angle at the centre, the field at the centre is (a full circle, , gives ). With :
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