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What's the difference between fluorescent lamp and incandescent lamp? What's the difference in the principle of luminescence? Make it clear!
Fluorescent lamp is mainly composed of lamp tube, ballast and starter. There is a filament at both ends of the lamp tube. The tube is filled with thin argon and trace mercury vapor, and the tube wall is coated with phosphor. The working principle of the lamp tube is different from that of the incandescent lamp. The gas between the two filaments mainly emits ultraviolet when conducting electricity, and the phosphor emits visible light only when exposed to ultraviolet light, The color of the light is also different
Incandescent lamp is high temperature light
RELATED INFORMATIONS
- 1. A Y, yn connection, 560kva, 10000 / 400V three-phase transformer is specially used for lighting. If the incandescent lamp is 100W, 220V, how many lamps can be connected to the three-phase? The solution is very simple, Sn / P = n, do you have a good idea? I still don't understand the meaning of the problem. If the lamp is connected to the secondary side, it must be connected to the secondary side, as long as the total rated current of the lamp is connected, It's OK to reach the required current of the secondary side, but it's different from the answer. The answer is 5600
- 2. It takes 6 minutes for a 1.8L electric kettle to boil a full kettle of water. The power is 1300w.220v and 50Hz. How many kilowatts of electricity is needed to boil a kettle of water? How to calculate?
- 3. How much W is 220 V / 50 Hz / 3A?
- 4. How many watts is the host power supply 220 V 4.0 a 50 Hz
- 5. Rated voltage: 220 V rated power: 500 W rated frequency: 50 Hz what resistance is used? What's the color of one ring of four-color ring? What's the color of two ring, three ring, four ring? Or what's the resistance?
- 6. How to change a 12 V AC transformer into an 11 V DC charger? (battery voltage: 11 V, current: 3.6 a)
- 7. In the circuit with 2.4kw power and 220 V supply voltage, the fuse with 6 a fusing current can be selected______ (judge right or wrong)
- 8. What is the resistance of an electric appliance with 1.5KW heating tube and 220V voltage?
- 9. In a series circuit, when there are multiple electrical appliances, how does the current change when one resistance is constant and one resistance is increased? Is the current of series circuit determined by the large resistance? Or is the resistance small?
- 10. If the voltage at both ends of a certain section of circuit is constant, when 10 Ω resistor is connected, the current passing through is 1.5A; if 25 Ω resistor is used to replace 10 Ω resistor, the current passing through ↓ of the circuit will be 1.5A The current is____ The voltage at both ends of the circuit is____ .
- 11. The 220 V lighting circuit is connected with 10 60 W incandescent lamps, 10 40 W fluorescent lamps, 10 trial calculation branch I and circuit I (fluorescent lamp P factor is 0.5, ballast active power P loss is 8 W)
- 12. How to distinguish incandescent lamp from fluorescent lamp? Don't move the advanced one out. Explain how to distinguish it
- 13. Current carrying algorithm of copper wire Generally, the safe current carrying capacity of copper conductor is 5-8a / mm2, and that of aluminum conductor is 3-5a / mm2 For example: The recommended safe current carrying capacity of 1.5mm2bvv copper conductor is 1.5 × 8A / mm2 = 12a The recommended safe current carrying capacity of 2.5mm2bvv copper conductor is 2.5 × 8A / mm2 = 20A The recommended safe current carrying capacity of 4mm2bvv copper conductor is 4 × 8A / mm2 = 32A Why add BVV copper wire? Is it OK for me to calculate the current carrying capacity of copper wire in the future according to the above? But I see that there is a formula algorithm. Are these two the same
- 14. 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
- 15. How many kilowatt hours does 25 square meter aluminum wire consume per hour
- 16. 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
- 17. How much ampere current can a 10 square aluminum wire bear
- 18. What is the chemical property? Why is reducibility a chemical property
- 19. 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? ．
- 20. Iron and aluminum have high density My textbook says that green is less dense than iron