Electric field lines in 3D

The electric field exists in 3-dimensional space.  Below you can explore 3D drawings of the electric field lines of two charges.  You can change the magnitude (arb. units), sign, and position (arb. units) of the each charge.  You can use the mouse to change your viewing angle and zoom in or out.  To view field lines of one charge only, choose zero for the magnitude of charge B.