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How to define current What is current? The formation of electric current,
The directional flow of charge is called current
Current intensity: the amount of charge passing through the cross section per unit time
What does 10A (20a) on the electric energy meter mean?
It is said in the book that 10A represents the maximum allowable current, what does 20A mean? Why is there no rated current?
10A is the current allowed to pass, 10a, 20A is the maximum current allowed to pass in a short time
RELATED INFORMATIONS
- 1. The maximum allowable current of a school's electric energy meter is 25A. The school has installed 50 40W electric lamps and 20 60W electric lamps. I want to install electric energy meter in the school How many can you press at least 40W
- 2. Single phase watt hour meter My meter count is 00091! Is it 91 degrees or 9.1 degrees? There is no red bit, but I am confused!
- 3. The electric kettle with the rated voltage of 220 V is connected to the home circuit and works normally. The indication of the electric energy meter is increased by 0.1 kW. H after 12 minutes of continuous power supply to calculate the electric power of the electric kettle
- 4. An electric water heater marked with 220v1100w is connected to the circuit of 220V, and it is powered on for 0.5h, so as to ensure the safety (1) What is the current through the electric water heater? (2) How much kwh of electricity is consumed? (3) How many joules of heat does the current generate in the electric water heater?
- 5. Is it possible to use a 2.5 (10) a 220 V electric energy meter for a 6000W instant electric water heater? The line is 2.5 flat
- 6. Five minutes later, the dial of the watt hour meter turned 110R What is the actual revolution of the meter? It is marked as 220v5a50hz 2500r / kW. H
- 7. he connected the electric appliance marked with 220v3a into the circuit separately, and after the electric appliance worked normally for 5min, the electric energy meter turned round He connected the electric appliance marked with 220v3a into the circuit separately. After the electric appliance worked normally for 5min, the rotary table of the electric energy meter turned 110R. What is the actual speed of the electric energy meter per kilowatt hour
- 8. An electric kettle marked with "220 V & nbsp; 550 W" works under rated voltage. The calculation is as follows: (1) the current through the electric kettle when it works normally; (2) the electric energy consumed by the electric kettle when it is energized for 6 min
- 9. Electricity meter 3000r / kW. H, connected to a lamp, 3 minutes to 150r, how much energy does the bulb consume during this time
- 10. Two bulbs, know the rated voltage and rated power, how to series in the circuit of the actual power How to calculate the actual power in series in the circuit (the circuit voltage is known)?
- 11. What's the function of electric energy meter installation in the first home circuit Isn't it true that if you install it in the back and use electricity in the front, it won't work That is to say, the watt hour meter will not reverse as the ammeter
- 12. What is the function of energy meter and fuse in home circuit
- 13. The dial of an electric energy meter is marked with the word "3000r / kWh", which means that for every 1 kwh of electric energy consumed, the rotary table of electric energy turns 3000 circles. If only one bulb is connected in the room, and the rotary table turns 15R within 3 minutes, how many kWh and J are the electric energy consumed by the bulb during this period?
- 14. The rated current of a school's electric energy meter is 25A. The school has installed 50 40W electric lamps and 20 60W electric lamps. If you want to install more electric lamps, how many 40W electric lamps can you install at most?
- 15. (Lianyungang, 2010) Xiaoming's electronic energy meter is marked with the words "3200imp / (kW · h)". When his family only turns on a certain electrical appliance, it is found that in 10 minutes
- 16. The dial of the electronic watt hour meter is marked with "3000imp / kW. H". If an electric appliance is connected to the meter for 20 minutes, the electric energy can be saved
- 17. The dial of electronic watt hour meter is marked with the words "3200imp / kW · H" (IMP / kW · H "is an important parameter of electronic watt hour meter -" pulse output "unit, and its value represents the number of times that the power consumption indicator on the dial of 1kW · h consumes electricity). When an electrical appliance is connected to the meter alone and works for 20min, the indicator of the watt hour meter flashes 320 times, and the energy consumption of the electrical appliance in the above time The electric energy is______ KW · h, the electric power of the electric appliance is______ W. The maximum power of the electronic watt hour meter is______ W．
- 18. How many watts is AC 220 V 50 Hz? I want to see how many watts of power supply, but it only says AC 220 V 50 Hz. How many watts of power supply is this? It is pasted with yellow paper, and then nothing is written! My configuration is e2140 p5gc MX plus 8500gt maverick 160g 1G memory. I think it should be 350W or 330W?
- 19. How long does it take for a 220 V / 50 Hz 20 W bulb to use one degree of electricity? I rent a house. I don't live for a long time. I can only use the 220 V / 50 Hz 20 W light bulb. How often do I use it
- 20. 1.5 (6) a meter, 1 degree of electricity is equal to 15 degrees, the meter can withstand the maximum power