Assertion: magnetic field's direction | /r/HasProperty | given by right thumb
Facets:
Source sentences:
text: Each loop of current has a direction associated with it: its normal vector is perpendicular to the loop, in the direction given by the right thumb when the right fingers curl in the direction of the current.
text: is perpendicular to the loop, in the direction given by the right thumb when the right fingers curl in the direction of the current.