The electrical appliance having higher power draws a larger current.

Two lamps,one rated $100 \, W$ at $220 \, V$ and the other $60 \, W$ at $220 \, V$,are connected in parallel to a $220 \, V$ supply. Find the current drawn from the supply line.

If $1 \text{ ampere}$ electric current passes through a conductor,how many electrons will pass per second?

What is the unit of resistance?

$A$ battery is a source of maintaining a constant potential difference across two ends of a conductor.

Give reasons for the following:
$(i)$ Tungsten is used almost exclusively for the filament of electric lamps.
$(ii)$ Why do we use copper and aluminium wires for the transmission of electric current?