Question

two lamps one rated 100W ; 220 V,and the other 60W; 220V, are connected in parallel to electric manis suppply .find the current drawn by two bulbs from the line if the supply voltage is 220 V

Answer 1

Voltage is same in parallel to electric mains supply. so current can be calculated by P=VI in 100W,220 rated lamp is 100/220=5/11 A. current similarly in 60W,220V= 3/11 A. total current =5/11+3/11 A =8/11 A if supply voltage is 220 V.