Question

The direction of magnetic field lines at

a point is taken to be the direction in which the

north pole of a magnetic needle points.​

Answer 1

Answer:

The direction of the magnetic field is taken to be the direction in which a north pole of the compass needle moves inside it. Therefore it is taken by convention that the field lines emerge from north pole and merge at the south pole.

Explanation:

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Answer 2

The direction of magnetic field lines is defined to be the direction in which the north end of a compass needle points. The magnetic field is traditionally called the B-field. ... (Recall that the Earth's north magnetic pole is really a south pole in terms of definitions of poles on a bar magnet.)