Assertion: magnetic field's direction | /r/CapableOf | provide the information
Facets:
value: on the direction of the field
type: LOCATION
value: with the convention
type: OTHER
Source sentences:
text: The direction that magnetic field lines are oriented provides the information on the direction of the field, with the convention that the lines have arrows drawn so the lines exit from the North pole of a permanent magnet, or equivalently, the arrows point in the direction that the North end of a compass needle would point if placed on the line.