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Using Ampere circuital law, obtain an expression for magnetic field ‘B’ at a point at a…
Using Ampere circuital law, obtain an expression for magnetic field ‘B’ at a point at a perpendicular distance ‘r’ from a long current carrying conductor. (Recall)
Given: Ampere's circuital law $\oint \vec{B} \cdot d\vec{l} = \mu_0 I$ around a circular path of radius r
To show: $B = \frac{\mu_0 I}{2\pi r}$
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From ISC 2026 Specimen Physics Paper 1, question 11.