Question

Does every magnet necessarily have a north and south pole? Substantiate your answer.

Answer 1

solution:-

according to second equation of maxwell (gauss law for magneto statics ) is

$\nabla.B=0$

its conclude that magnetic monopole can not exist.

these always appear only in pairs and there is no source and sink for magnetic lines of forces.

if we break a magnet into two parts these also consist of both poles(south and north pole) individually .therefore single pole (either south or north ) does not exists.