A 220v 2 hp motor has an efficiency of 80%, If power costs 3.00 per kh hr for the first 50 kw hr, 2.90 for the second 50 kwhr, 2.80 for the third kw hr and so on until a minimum of 2.00 per kwhr is reached, how much does it cost to run this motor continuously for 7 days.

Q: What is the cost of operating a 5.00 W electric clock for a year if the cost of electricity is…

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Q: A  typical incandescent reading lamp runs at 60W. If it is left on constantly, a) how much energy…

A: Given data:  Power (P) = 60 W = 0.060 kW Energy charges = 12.5 cents per kWh

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A: The expression for the energy is given by,

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A: Power of clock (P) = 3.1 W cost of electricity = $0.125 per kWh

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A: Power: The energy per unit time is known as power. Power = Energy/time

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A: Given data:  Power (P) = 100 W Time (t) = 80.0 h Required: Energy (E)

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A: Given: Full load efficiency is 85 % Efficiency of high-efficiency motor can be 90%

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A: The given data are: E=3.2×104 Wt=42 sh=12 mm=1800 kg Here, E denotes the electrical power, t denotes…

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A: Given : P = 100 W t = 90 minutes = (90)(60) = 5400 seconds

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Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.