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Using Ampere's circuital law, obtain an expression for magnetic flux density of the magnetic field…

Physics20263 marksDerivation
Using Ampere's circuital law, obtain an expression for magnetic flux density of the magnetic field at a point near a long straight wire, carrying a current I.

Given: A long straight wire carrying a steady current $I$

To show: $B = \frac{\mu_{0} I}{2\pi r}$

Answer

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Moving charges and magnetism

From ISC 2026 Improvement Physics Paper 1, question 11.