Question

why magnetic field lines originat from north pole​

Answer 1

Explanation:

When unlike poles, i.e. the north and the south poles of two magnets are placed close to each other, the magnetic field lines link, causing the magnets to attract each other. ... Therefore the magnetic south pole of the compass needle points towards the north pole of the earth.

Answer 2

$\huge\underline\orange{\mathcal Answer}$

Magnetic field lines originate from the north pole and end at the south pole. This is an inherent property of every magnetic substance, widely known but not entirely understood.