Question

Two lamps,one rated 100W at 220V and the other 60W at 220v are connected in parallel to a 220v supply.What current is drawn from the supply line?

Answer 1

Solution:

Both the bulbs are connected in parallel. Therefore, potential difference across each of them will be same that is 220 V, Current drawn by the bulb of rating 100 W is given by

I=P/V

=100/220=0.4545...A

Similarly, current drawn by the bulb of rating 60 W is given by

I=P/V

=60/220=0.2727...A

∴ the total current drawn from the line =0.4545+0.2727=0.727A