what special property does the north pole of a magnet possess or why is that the all the magnetic field lines starts or originates from it and ends or goes in to the South Pole.
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Solution
no reason just convention we takes or assumes
Why magnetic lines start from north pole? That is equivalent to asking why electric field lines begin from a positive charge and end into a negative charge? or why the direction of the current is the direction of flow of positive charges? Or why protons are positive and electrons are negative ? Or why A is called A or B is called B? :D
Get it? it is just a convention, there is no reason, we have to chose one direction and then work with it right? we liked to think of north pole as similar to a positive charge And so we liked to think of magnetic field lines starting from N and ending towards S