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Write an expression for the magnetic field produced by aninfinitely long straight wire carrying acurrent I, at a short perpendicular distance a from itself.please give explanation |
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Answer» Answer: Ampere's law EQUATION ∮ B . dℓ=μ∑i Here B. ℓ=μ∑i here dμ length element perpendicular to the PLANE of PAPER ∮ B. dℓ=μ o∑i B → MAGNETIC field which is also perpendicular to plane of paper & align with length elements ∮ B . dℓ=μ o∑i B.∮dℓ=μ oi B.2π=μ oi B= 2πrμ oi
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