State $a$. difference between the wire used in the element of an electric heater and in a fuse wire.
Battery is a source of maintaining a constant potential difference across two ends of a conductor.
The distllled water acts as ........ for the electricity.
The unit of measurement of charge is coulomb.
Calculate the number of electrons constituting one coulomb of charge.
(Charge on one electron $=1.6 \times 10^{-19} C$ )
If $2 \times 10^{-3} J$ of work is done in moving a particle carrying a charge of $10 \times 10^{-6}$ coulomb from infinity to a point $P .$ What will be the potential at the point $P ?$