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Q.15. 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?

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Given :

For lamp one: Power = P1=100W and V = 220V

$I_1=\frac{P_1}{V}=\frac{100}{220}=0.455A$

For lamp two: Power = P2=60W and V = 220V

$I_2=\frac{P_2}{V}=\frac{60}{220}=0.273A$

Thus, net current drawn from supply is 0.455+0.273=0.728A

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seema garhwal

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