Question

obtain expression for the intensity of magnetic field at a point situated at the same distance from either pole of a bar magnet.​

Answer 1

ANSWER

Let NS be a bar magnet of magnetic length 2l and having each pole of magnetic strength m . O is the center of magnet and P is a point on axial line at a distance r from the center O of magnet , at which magnetic field has to be measured .The magnetic field B 1 at P due to N pole of magnet ,