Q. 21 B4.3( 8 Votes )

What is the maximum number of 60 W bulbs that can be run from the mains supply of 220 volts if you do not want to overload a 5 A fuse?

Answer :

Let us assume the number of bulbs be y.

Power of y bulbs, P=60y


V=220V, I=5A


We know that


P = VI


60y = 220 x 5


60y = 1100


y=18.33


So, number of bulbs required are 18.


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