Question

By moving a 20 nC charge from point A to point B, you determine that the electric potential at B is 100 V . Part A What would be the potential at B if a 40 nC charge were moved from A to B

Answer 1

Answer:

Potential at B would be 100V

Explanation:

The electric potential is defined as the work done to bring a unit positive charge from infinity to some point in the field.

We always determine the potential with respect to some reference point. Let the potential at A be zero. If the potential at B is V, then work done to bring charge q from A to B = qV

which is the electric potential energy.

If instead we use some charge Q, the electric potential energy will be QV, but the electric potential will always be V.