Question

some electric lamps connected to a 220 volt Electric Supply lines are rated 20 watt how many lamps can be connected in parallel with each other across the two wires of 220 volt lines if the maximum allowable current is 5 ampere

Answer 1

as we know that p=vi so
total power=220×5
=1100
now no of bulbs that can be connected are
=total powers individual power
=1100÷20
=55