An electric lamp is marked 60 W, 230 V. The cost of 1 kilowatt hour of power is Rs. 1.25. The cost of using this lamp for 8 hours is
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Given power = 60 W = 60/1000 kW = 0.06 kW Time used in a day = 8 hours Energy consumed in one day = Power x Time = 0.06 kW x 8 hours = 0.48 kWh Show more…
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