Question

An electric bulb is rated as 10 W, 220 V. How many of these bulbs can be connected in parallel across the two wires of 220 V supply line if the maximum current which can be drawn is 5 A ?

Answer 1

P=10W, V=220V, I=5A 

We know that 

P=VI =220X5 P=1100W 

Power of one bulb=10W 

Total no. of bulbs that can be connected=1100/10=110