Question

Two lamps, one rated 100 W; 220 V, and the other 60 W; 220 V are connected in parallel to

electric mains supply. Find the current drawn by two bulbs from the line if the supply voltage is 220 V




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Answer 1

Heya!

Here's how you do it:-

First, remember that  

Current= $\frac{W}{V}$

Here, two bulbs are there. Each has a different W ( wattage)

First, find the total W.

Total W= 100+60

W = 160 W

Next, let's apply this to our question:-

current =

$\frac{160}{220}$

curent will be

0.72 A

( A means Ampere, current is written as A)