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Question: Two bulbs of 100 watt and 200 watt, rated at 220 volts are connected in series. On supplying 220 vol...

Two bulbs of 100 watt and 200 watt, rated at 220 volts are connected in series. On supplying 220 volts, the consumption of power will be

A

33 watt

B

66 watt

C

100 watt

D

300 watt

Answer

66 watt

Explanation

Solution

In series PConsumed=P1P2P1+P2P_{Consumed} = \frac{P_{1}P_{2}}{P_{1} + P_{2}}

⇒ PConsumed=100×200300=66WP_{Consumed} = \frac{100 \times 200}{300} = 66W