Two lamps one rated 100W at 220V, and the other 60V at 220V,are connected in parallel to electric mains supply .what current is drawn from the line if the supply voltage is 220V? these methods should be solved by v2/R formulae
We know that, P = VI
therefore, for the lamp rated 100W-220V, current flowing ,I1 = P/V = 100/220 = 0.45A and, for the lamp rated 60W-220V, current flowing ,I2 = P/V = 60/220 = 0.27 A