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When three identical bulbs of 60 W, 200 ...

When three identical bulbs of `60 W, 200 V` rating are connected in series to a `200 V` supply, the power drawn by them will be

A

180 watt

B

10watt

C

20 watt

D

60watt

Text Solution

Verified by Experts

If rated voltage=supply voltage then in series combination of bulbs
`(1)/(P_(eq))=(1)/(P_(1))+(1)/(P_(2))+(1)/(P_(3))+`.............
For this question
`(1)/(P_(eq))=(1)/(60)+(1)/(60)+(1)/(60)=(3)/(60)=(1)/(20)rArrP_(eq)=20` watt
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