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

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.

3. dark matter

empty space could also be a simple vacuum