Electric Field Lines
Visualize fields from point charges in 3D
Electric field lines show the direction a positive test charge would move. They originate from positive charges, terminate on negative charges, and never cross. The density of field lines represents field strength. When multiple charges are present, the total field at any point is the vector sum of individual fields (superposition principle). Equipotential surfaces are perpendicular to field lines — no work is done moving a charge along an equipotential.
Can you feel the electric force from your phone charger? It's there — you just can't sense it.
Electric fields surround every charged object. The field from your phone charger is real but far too weak for human perception — you'd need billions of times more charge to feel a tingle.