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Answer to Question #12303 in Electric Circuits for Som

Question #12303
Five bulbs,each rated as 220v 100 watt burnt for 4 hours.What is the cost of electricity consumed if the rate is 50 paise per unit?
Expert's answer
The power consumed is

W = 5 * 100 watt * 4 hours = 5 * 0.100 kilowatt * 4 hours = 2 kilowatt*hours.

So, the cost of consumed electricity is

P = 2 units * 50 paise = 1 rupee.

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