Magnetic field at the centre of a rectangle of length `l &` width `d` carrying a current `i` is give
Channel: Doubtnut
Date: 26/01/2020

Magnetic field at the centre of a rectangle of length `l &` width `d` carrying a current `i` is given by `(nmu_(0)i)/(pid)` then find value of `N` (here `l gt gt d`)