A theoretical line in a field of power, in a way that a tangent at any point provides course regarding the field when this occurs.
an imaginary line in a field of power, whoever tangent at any point provides the way for the industry when this occurs and whoever quantity through product area perpendicular into the area signifies its power
any range in a place for which causes tend to be acting, therefore attracted that at every point associated with range its tangent may be the way associated with resultant of all causes. It cuts at right sides every equipotential surface which it meets. Particularly (Magnetism), a line in distance to a magnet therefore drawn that any part of it really is tangential with all the path of a short compass needle held when this occurs.
an imaginary range in a field of power; direction of this line at any point may be the path associated with the power when this occurs