Answer:
The direction of a magnetic field is by convention, the direction towards which the northpole of a compass needle points when placed under the influence of the magnetic field at any location.
Explanation:
A Magnetic field is a vectorial force field.
As such, the direction of such a field is very important when describing it.
The direction of a magnetic field is by convention, the direction towards which the northpole of a compass needle points when placed under the influence of the magnetic field at any location.
The direction of a magnetic field may be further described using magnetic field lines .
PS: An important feature of magnets is that like poles repel and unlike poles attract. Just an additional detail.
