The capacity of a charged body to do work is called electric potential. When a body is charged, work is done in charging it. This work done is stored in the body in the form of potential energy. The charged body has the capacity to do work by moving other charges either by attraction or repulsion. The ability of the charged body to do work is called electric potential.
Electric Potential, V = Work done/Charge = W/Q
Unit of electric potential is joules/coulomb or volt.
A body is said to have an electric potential of 1 volt if 1 joule of work is done to give it a charge of 1 coulomb.
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