Materials that allow current to pass through them.

The S.I. unit of electric current is _____.

The $1800 \mathrm{C}$ electric charge is passing through an electric bulb in one hour. How much current will pass through an electric bulb ?

Two lamps, one rated $100 \mathrm{W}$ at $220 \mathrm{V}$, and the other $60 \mathrm{W}$ at $220 \mathrm{V}$, are connected in parallel to the electric mains supply. What current is drawn from the line if the supply voltage is $220 \mathrm{V}$?

Define electric current and give its SI unit.

Calculate the effective resistance across AB.

The diagram above shows a circuit with the key k open. Calculate the resistance of the circuit when the key k is open and calculate the current drawn from the cell when the key k is open.

Name and define unit for electric current.

Which device is used to check the presence of electric current?

What is a conductor of electricity? Give two examples.