Define the term electric potential. State it's S.I. unit.

Define the term resistance. State it's S.I. unit.

How is the electric potential difference between the two points defined? State it's S.I. unit.

(a) State whether the current is a scalar or vector? What does the direction of current convey?

(b) State whether the potential is a scalar or vector? What does the positive and negative sign of potential convey?