An isolated positive charge.
The field lines point away from the charge
i.e. in the direction that would be taken by a positive test charge.
An isolated negative charge.
The field lines point towards the charge
i.e. in the direction that would be taken by a positive test charge.
A positive and negative charge.
Two positive charges.
An isolated positive charge
showing both electric field lines and equipotential surfaces.
Two positive charges.
showing both electric field lines and equipotential surfaces.