A straight wire of length `(2pi^(2))` metre is carrying a current of `2A` and the magnetic field
Channel: Doubtnut
Date: 2020-08-30

A straight wire of length `(2pi^(2))` metre is carrying a current of `2A` and the magnetic field due to it is measured at a point distant `1 cm` from it. If the wire is to be bent into a circle and is to carry the same current as before, the ratio of the magnetic field at its centre to that obtained in the first case would be