- Total power = Number of bulbs × Power per bulb = 5 × 100 W = 500 W. - Convert power to kilowatts (kW): 500 W = 0.5 kW. - Total time = 20 hours. - Energy consumed = Power × Time = 0.5 kW × 20 hours = 10 kWh. - 1 unit of electricity is equal to 1 kWh. - Therefore, the consumption of electricity is 10 units.
Five bulbs each of 100 watt capacity in a tunnel are illuminated continuously for twenty hours. The consumption of electricity will be:
Asked in UPPCS Prelims 2017 · Topic: Electric Current (Electrical Power and Energy, Joule heating effect)
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