Current Electricity and Electrical InstrumentHard

Question

Three 60W, 120W light bulbs are connected across a 120 V power source. If resistance of each bulb does not change with current then find out total power delivered to the three bulbs.

Options

A.180 W
B.20 W
C.40 W
D. 60 W

Solution

R Here R = , Total power supplied = × 60 = 40 W

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