What do mean by the potential difference between two points in an electric field?

What is meant by potential difference between two points ?

What is the potential difference between two points in the electric field? Name its SI unit.

What is the potential difference between two points in the electric field? Name its SI unit.

Define electric potential difference between two points in an electric field. Is it a scalar or vector?

Define electric potential difference between two points in an electric field and derive an expression for it. Also give S.I. unit of electric potential differnce.

The device used to measure potential difference between two points in an electric circuit is "________" .

There exists a potential difference of 5V between two points in an electric field. Work done in moving a charge of 7C from one point to the other is