JEE Main 2024 Physics question
A regular polygon of 6 sides is formed by bending a wire of length 4π meter. If an electric current of A is flowing through the sides of the polygon, the magnetic field at the centre of the polygon would be x × T. The value of x is .
Answer: 72
Solution
Side a = 2π/3 m, apothem d = π/√3 m; \dfrac{μ_0I}${4π
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