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Question -

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



Answer -

Since both the bulbs are connected in parallel, the voltage across each of them will be the same.
Current drawn by the bulb of rating 100 W can be calculated as follows:
P = V × I
I = P/V
Substituting the values in the equation, we get
I = 100 W/220 V = 100/220 A
Similarly, the current drawn by the bulb of rating 60 W can be calculated as follows:
I = 60 W/220 V = 60/220 A
Therefore, the current drawn from the line is

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