How much work is done in moving a charge of $2 \, C$ across two points having a potential difference of $12 \, V$ (in $, J$)?

Give a single word for $\frac{1 \text{ joule}}{1 \text{ coulomb}}$.

Which of the following has the unit $volt$?

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

Name a device that helps to maintain a potential difference across a conductor.