A long straight wire of circular cross section of radius 5

Last updated: 6/7/2023

A long straight wire of circular cross section of radius 5 cm is carrying a steady current of 10 A uniformly distributed over its cross section If the magnetic field induction at 2cm from the axis of the wire is same as that at a distance x from its surface then x is A 15cm B 7 5cm C 25cm D 15cm