Q6 of 44 Page 85

Two lamps of 100 W and 60 W are joined in parallel with 220 V lines. How much current will flow through the circuit?

Given

Lamp 1 = 100W


Lamp 2 = 60W


Voltage (V) = 220V


Formula Used


Ohm’s Law



V = voltage


I = Current


R = resistance


Power Formula



P = power


V = voltage


R = resistance


Parallel Resistance formula



Resistance of lamp 1



R = 484Ω


Resistance of lamp 2



R = 806.7Ω


Since, both the lamps are joined in parallel; Hence total resistance will be



R = 302.5Ω


Using Ohm’s Law



Total current = 0.73 A


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