Work Done to Move a Charge on an Equipotential Surface

Why is the work done to move a charge on an equipotential surface Zero....
- Prudhvi Raj Borra (age 16)
Machilipatnam,Andhra,India.

It's a matter of definition.  Equipotential means same potential everywhere.   The amount of work done on a charge Q when moving it from potential V₁ to V₂  is (V₁ - V₂ )*Q.   Since on an equipotential V₁ is equal to V₂  the net work is zero.

LeeH

(published on 12/11/2009)