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Four identical bulbs each rated 100 W and 220V are connected across the battery and the total electric power consumed by the bulbs is

Four identical bulbs each rated 100 W and 220V are connected across the battery and the total electric power consumed by the bulbs is 

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Grade:12th pass

1 Answers

Adarsh
768 Points
6 years ago
Dear Abhishek,
Power = v2/R =>   100=(220)2/R  =>  R= 484ohm
so resistance of each bulb is equals to 484ohms.
Now, the effective resistance of the circuit is 1936/3 ohm.
power = v2/R  220.220.3/4.484= 75watt..
Thanks and Regards 
Adarsh

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