(a)

Define volt, the unit of potential difference.

(b)

Calculate the work done required to move an electron between two points A and B located at a potential difference of $\displaystyle 100$ V in an electric field.

$\displaystyle 1$ Volt is the potential difference between two points in a current carrying conductor when one Joule work is done to move a charge of 1Coulomb from one point to the other. / \(\displaystyle 1 \mathrm{~V}=\frac{1 \mathrm{~J}}{1 \mathrm{C}}\)

\(\displaystyle \mathrm{V}=\frac{\mathrm{W}}{\mathrm{Q}}\)

\(\displaystyle \mathrm{W}=\mathrm{Q} \times \mathrm{V}\)

\(\displaystyle \mathrm{W}=1 \cdot 6 \times 10^{-19} \times 100\)

\(\displaystyle \mathrm{W}=1 \cdot 6 \times 10^{-17} \mathrm{~J}\)