A power transmission line carries 520 A of current at a voltage of 924 kV. If the line has a resistance of 48 u/m, what is the rate at which energy is being dissipated (in kW) over 509 km of line?
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- (a) What is the cost (in $) of heating a hot tub containing 1590 kg of water from 10.0°C to 40.0°C, assuming 75.0% efficiency to account for heat transfer to the surroundings? The cost of electricity is 9.00 cents/(kW · h). $ (b) What current (in A) was used by the 220 V AC electric heater, if this took 4.20 h? AA turbine of a coal burning installation delivers 1,500 hp of mechanical energy to a generator. The generator then converts 80.0% of the mechanical energy into electrical energy. If the terminal potential difference of the generator is 2350 V, what current does it deliver (in A)?A small generating station produces 120 kW of effective power that is transmitted by two wires, each having a resistance of 0.045Ω. How much power is saved by transmitting the power at 2.5 kV instead of 120 V?
- The resistance of electric heater is 32 Ohm when connectedto 120 V What is the power consumption of the heater?An electric washing machine draws 2.1 A when connected to a 121 V power line. In Arkansas, the average price of electricity is $0.090 per kilowatt-hour. To the nearest cent, how much does it cost to use the washing machine to wash one load of colors and one load of whites if the washing machine runs for 35 min each time it is used? Remember, round to two decimal places, the nearest cent.A 1500 W microwave oven runs off of a 240 V supply. The current drawn is by the microwave is 6.25Amps a) If the electricity cost is $0.0925 per kWh, how much does it cost to run the microwave for 5 min?
- I have a computer that consumes a maximum of 15 W of power and I use a 5000 mAh battery. How long will it last at maximum power draw assuming it uses 20 V.A toaster is rated at 80.0 W, when connected to a 132.0-V source. What current (in amperes) does the toaster carry? Round your answer to the nearest hundredth of an ampere.What is the effective resistance of a car's starter motor when 150 A flows through it as the car battery applies 11.0 V to the motor?