Potential and potential difference are vector quantities.

How much work is done in moving a charge of $2 \ C$ from a point at $118 \ V$ to a point at $128 \ V$ (in $J$)?

How is a voltmeter connected in a circuit?

$(a)$ Define the term 'volt'.
$(b)$ State the relation between work,charge,and potential difference for an electric circuit. Calculate the potential difference between the two terminals of a battery,if $100 \ J$ of work is required to transfer $20 \ C$ of charge from one terminal of the battery to the other.

How is a voltmeter connected in the circuit to measure the potential difference between two points?

How much energy is given to each coulomb of charge passing through a $6\, V$ battery (in $, J$)?