Question

WHY DO MAGNECTIC POLES ALWAYS OCCUR IN PAIRS

Answer 1

Because they can't be isolated, if you'll cut a magnet bar into pieces, again you'll have two ends- North pole and South pole. Thus, they always occur in pairs.

Answer 2

it is because we cant isolate north pole nor we can isolate south pole and if we try to isolate it by cutting again we get north pole and south pole