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

Explanation

The term volt is the SI unit of potential difference . Potential difference is said to be 1 volt if one joule work is to be done to carry 1 coulomb charge from one point to another.
(b) The relation between work (W), charge (Q) and potential difference (V) for an electric circuit is
`V=W/Q`
Given that W=100J and Q=20C
`therefore` Potential difference `V=W/A=(100 J)/(20 C)=5V`