Equipotentials at a great distance from a collection of charges whose total sum is not zero are approximately

Equipotential at a great distance from a collection of charges whose total sum is not zero are approximately

Equipotential at a great distance from a collection of charges whose total sum is not zero are approximately

What are minmum number or unequal fores whose vector sum is zero ?

Write two properties of equipotential surfaces. Depict equipotential surface due to an isolated point charge. Why do the equipotential surfaces get closer as the distance between the equipotential surface and the source charge decreases?

Draw an equipotential surface of two identical positive charges for small distance.