Define the term current and state it's S.I. unit.

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

Explain the statement 'the potential difference between two points is 1 volt'.

(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?