Obtain an expression for magnetic field (B) at the centre of a circular coil having 'n' turns of…
Obtain an expression for magnetic field (B) at the centre of a circular coil having 'n' turns of radius 'R' when it is carrying a current 'I'.
Given: A circular coil of radius R carrying current I, with n turns
To show: $B = \frac{\mu_{0} n I}{2R}$
Answer
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From ISC 2026 Physics Paper 1, question 11(i).