# Magnetic Field Due to a Cylindrical Wire

Magnetic Field Due to a Cylindrical Wire Magnetic field due to a cylindrical wire is obtained by the application of Ampere’s law. 1) Outside the Cylinder: In all above cases magnetic field outside the wire at P, ∫B̄.dl̄̄ = µ₀I ⇒ B ∫dl = µ₀i. B x 2πr = µ₀i ⇒ Bout = µ₀i/ 2πr Read more about Magnetic Field Due to a Cylindrical Wire[…]