Electric field lines(电力线) The rules for drawing electric field line: 1.Electric field lines are drawn so that the tangent to the field line at each point specifies the direction of the electric field E at that point. 2.The density in space of electric field line around a particular point is proportional to the strength of electric field of that point Electric field lines(电力线) The rules for drawing electric field line: 1. Electric field lines are drawn so that the tangent to the field line at each point specifies the direction of the electric field E at that point. 2.The density in space of electric field line around a particular point is proportional to the strength of electric field of that point