MHT CET 2024 Physics question
An arc of a circle of radius 'R' subtends an angle at the centre. It carries a current I. The magnetic field at the centre will be ( = permeability of free space)
Answer: (B)
Solution
For a circular arc subtending angle at the centre, (the full loop, , gives ). With : \dfrac{μ_0 I}{4π R}\dfrac{π}{2}$ =
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