![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
How many joules of electric energy is consumed in one second when a 220 V 500 W electric furnace is connected to a home circuit? How many minutes will it take if 1kW. H power is consumed?
1w=1J/s
500W * 1S = 500 WS = 500 J
1KW.H =1000 W *60 M =60000 W.M
60000 W.M / 500 W =120 M
The energy consumed in one second is 500 joules
If the power consumption is 1kW. H, it needs to work for 120 minutes
There is an electric heater, whose specification is 220 V, 500 W, which can boil a pot of water in 10 minutes under normal operation. If it is connected to a 220 V circuit, how long does it take to boil the same pot of water?
10 minutes
The rated voltage of an electric iron is 220 V, and the resistance is 1210 Ω when it works under the rated voltage? (2) What is its rated power? (3) How much heat does it produce when it is electrified for 10 minutes at rated voltage?
(1) I = ur = 220v1210 Ω = 211A ≈ 0.18a, (2) P = u, I = 220V × 211A = 40W, (3) under rated voltage, P = P = 40W, q = w = Pt = 40W × 600s = 2.4 × 104j. Answer: (1) the current passing through it is 0.18a; (2) its rated power is 40W; (3) it generates 2.4 × 104j heat after being electrified for 10min under rated voltage
What is the power consumption for 10 hours of charging with 220 V, 50 Hz and 800 ma?
1000 / 220 * 0.8 = 5.68 kWh
RELATED INFORMATIONS
- 1. How many kilowatt hour power consumption of 220 V, 50 Hz and 20 W?
- 2. Who can tell me why the work done by electric current is equal to the consumption of electric energy
- 3. The process of electric current doing work is to convert electric energy into electricity______ How much energy is consumed______ The current does work through the electric lamp, and the electric energy is converted into energy______ Energy; electricity is converted into electricity by doing work through an electric motor______ Electric energy is converted into electricity by doing work through an electric heater______ Energy. Watt hour meter, which is used to measure energy______ It's a good instrument
- 4. Iron and aluminum have high density My textbook says that green is less dense than iron
- 5. Copper coin used to be a widely circulated currency in history. It is known that the melting point of copper is 1083.4 ℃ and the melting point of iron is 1534.8 ℃. From the perspective of physical and chemical properties, why is copper used instead of iron to cast currency? ．
- 6. What is the chemical property? Why is reducibility a chemical property
- 7. How much ampere current can a 10 square aluminum wire bear
- 8. How many square aluminum wires are needed for a 10kW motor 200m away from the transformer I want to connect three-phase power. The distance between my place and the transformer is 220 meters. How many flat aluminum wires are suitable? Can I buy a 10 flat aluminum wire with leather, a 10 kW motor
- 9. How many kilowatt hours does 25 square meter aluminum wire consume per hour
- 10. How to calculate the current and power of 380V three phase circuit (electric heating circuit) For example, if the power is 10kW, how much is the current? Just give a specific formula and result
- 11. A "220 V, 1000 W" electric furnace is connected to 110 V voltage to make it consume 1000 W power. The following methods are feasible A connect half of the wire to the circuit B. lengthen the electric furnace wire to twice the original length and connect it to the circuit C connect 1 / 4 of the wire to the circuit D connect 3 / 4 of the wire to the circuit
- 12. 110V 500W electric wire furnace, without voltage protection, directly plug in the 220V voltage, equivalent to how many w electric furnace How to reduce the power on the basis of the original heating wire?
- 13. Which is on between 110V, 40W incandescent lamp and 220V, 40W incandescent lamp?
- 14. If a lamp marked "220 V & nbsp; & nbsp; 40 W" is connected to 110 V power supply, the actual power of the bulb is () A. 40WB. 30WC. 20WD. 10W
- 15. The 220V 60W incandescent lamp can work normally on the 110V power supply
- 16. If two bulbs of 220 V 60 W and 220 V 40 W are connected in series and parallel in 220 V circuit respectively, 40 W is brighter, but why is the resistance of 40 W bulb larger than 60 W? If two bulbs of 220 V 60 W and 220 V 40 W are connected in series in 220 V circuit, 40 W is brighter, but why is the resistance of 40 W bulb larger than that of 60 W?
- 17. When a 220 V, 100 W light bulb is connected to a 220 V power supply through a section of wire, its actual power is 81 W, then how much power is lost on the wire?
- 18. Under the condition of a certain voltage, is there any difference between limiting power and limiting current? Why can't a 500W electric appliance (hot water kettle) be used in a 1000W circuit
- 19. A power is 400W, the voltage of 220 V rice cooker, how much electricity consumption in three hours?
- 20. A rice cooker is marked with the word "220V 3A". How many joules does the current do in 20 minutes of normal operation?