ABSTRACT
Ampère's law states that the line integral of https://www.w3.org/1998/Math/MathML"> B https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781032646688/a7d34903-20d2-4eb3-810e-5f76137f8550/content/math5_1.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> around a closed loop is equal to the magnetic constant times the current enclosed by the loop, https://www.w3.org/1998/Math/MathML"> ∮ d ℓ ⋅ B = μ 0 I e n . https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781032646688/a7d34903-20d2-4eb3-810e-5f76137f8550/content/math5_2.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/>
