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What is the symbol of kilowatt hour?
kwh
How many kilowatt hours is 1800000 joules
What are the detailed steps...
1800000 / 3600000 = 0.5 kWh
How many kilowatt hours is one joule?
W = Pt = 1 kW × 1 h = 1 kWh
= 1000 watts × 3600 seconds = 3.6 × 106 joules
That is, 1 kwh = 3.6 × 106 joules
The dial of the electronic watt hour meter is marked with the words "3000imp / kW. H". When an electrical appliance is connected to the meter alone and works for 200Min, the indicator light of the watt hour meter flashes 300 times. How much kW. H is the electrical energy consumed by the electrical appliance in the above time, and how much W is its electrical power
The 3000imp / kW. H on the electric meter is the electric energy of 1kW. H when the indicator light flashes for 3000 times. As you said, if the indicator light flashes for 300 times, it means that the electric energy of 300 / 3000kW. H is used, that is, the electric energy of 0.1kw. H is used in the above time. Then the electric power formula is used to require the power of the electric appliance: w = Pt, from: w = PT to: P = w / T
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- 1. What kind of instrument is an electric energy meter
- 2. Use an energy meter to measure the hourly electricity consumption of household appliances Give me the measured data, calculation process and results,
- 3. The panel of household electric energy meter is marked with 3600 rpm, which is connected to a 220 V 40 W electric appliance. When it works normally, the power of the electric energy meter will be reduced within one minute
- 4. The electric energy meter is marked with 3000r / kW · h. The primary electric appliance works alone, and the dial turns 150 turns in 10 minutes to calculate the electric power of the electric appliance
- 5. The electric energy meter can be used to measure the hourly electricity consumption of electrical appliances. Xiao Li wants to know the hourly electricity consumption of the hair dryer used by his hairdresser. He only knows that his rated voltage is 220 V, and there is no other data. Please use the general household electric energy meter [the data on the nameplate is as follows: 220 V 1325 kW · h 2.5 (5) a 50 Hz A simple method is designed to help Xiao Li calculate the hourly power consumption of this hair dryer Fast, fast, good answers plus points
- 6. How to calculate the electricity consumption per hour?
- 7. The more work the current does per unit time, the greater the electric power, right?
- 8. The following statement about electric power is correct () A. Electric power is a physical quantity indicating how much work is done by current. B. The more electric energy consumed by electrical appliances in the same time, the greater the electric power. C. when several bulbs in series work, the electric power of bulbs with large resistance is smaller. D. the more work done by current, the greater the electric power
- 9. In the same time, the greater the current in the appliance, the more work the current does? Is that right? Why not
- 10. What time units, seconds and hours are used to calculate electric power
- 11. At present, the electricity price of a city's residents is 0.52 yuan / kWh. The residents who install time-sharing meters implement electricity price. The charging standard is shown in the following table: Peak time (8:00-21:00) valley time (21:00-8:00 the next day) Hourly electricity price per kilowatt / RMB 0.55 0.35 Xiaogang's monthly electricity consumption is 140 kwh, and the valley hour electricity consumption is 3 / 7 of the total monthly electricity consumption? If a time-sharing meter is installed, how much is the electricity charge this month?
- 12. In order to encourage the public to save electricity, a municipal power company has stipulated the following calculation method of electricity charge: the monthly electricity consumption is not more than 100 kwh, and the charge is 0.52 yuan per kWh, If the monthly electricity consumption exceeds 100 kwh, the excess part will be charged at 0.6 yuan per kWh. Xiaomin's family paid 64.9 yuan in September. How many kwh did her family use in September?
- 13. In order to encourage energy saving, a city power company has stipulated the following calculation method: the monthly electricity consumption is not more than 100 kwh, and the charge is 0.52 yuan per kilogram hour If the monthly electricity consumption exceeds 100 kwh, the excess part will be charged at 0.6 yuan per kWh. Xiao Ming's family paid 64.4 yuan in October, and how much kwh is the electricity consumption? (the result is kept in integer),
- 14. In order to encourage energy saving, a municipal power company has stipulated the following calculation method of electricity charge: if the monthly electricity consumption does not exceed 100 kwh, it will be charged at 0.52 yuan per kWh In order to encourage energy saving, a city electric power company has stipulated the following calculation method of electricity charge: 0.5 yuan per kilowatt hour if the monthly electricity consumption does not exceed 100 kilowatt hours; 0.6 yuan per kilowatt hour if the monthly electricity consumption exceeds 100 kilowatt hours If the average electricity charge of a user is 0.55 yuan per kilowatt hour in February 2010, how many kilowatt hours does the user use in February? How much yuan should the user pay? (one yuan equation)
- 15. How many kilowatt hours of electricity can lead-acid batteries store at most
- 16. As shown in the figure, when the power supply voltage is constant and the resistance R is connected to two points a and B, the electric power of the resistance R is 9W; if the resistance R is connected to the As shown in the figure, when the power supply voltage is constant, the electric power of resistance R is 9W when the resistance R is connected to two points a and B; if the resistance R is connected to two points c and D far away from a and B, the electric power consumed by R is 4W, then the total electric power consumed by wires AD and BC is 9W______ w. (just say the process, the faster the better) You can make do with it. The voltage is on the far left, AB is on the left of CD, R is in the middle of AB, CD is in the middle, so do it
- 17. Is it correct to say that electrical appliances with high power must also have high power?
- 18. When there is only one consumer in the complete circuit, is the supply voltage equal to the consumer voltage
- 19. What are the functions of power supply and electrical appliances in the circuit?
- 20. A and B dual-purpose electrical appliances, the electric power ratio is 1 / 4, the resistance value ratio is 1 / 9, then the current value ratio through them is ()