There are many main methods to generate electricity, such as electrochemical methods, friction, electromagnetic induction, pressure, heating, photoelectricity, etc.
Everyday electricity and industrial electricity come from power plants. Domestic electricity consumption seems to be 380 V in 220 V Chinese industrial electricity. Firstly, the power plant generates electric power through a generator (there are many types of generators, such as wind turbines, thermal generators, hydroelectric generators, nuclear generators, tidal generators, etc.), then adjusts the voltage via a booster. , then reaches the substation around the user via wires, where the voltage is reduced via a voltage reducer, and then transmitted to thousands of homes via wires!
Electricity is a general term and is a physical phenomenoncaused by stationary or moving electrical charges. In nature, the mechanism of electricity produces many well-known effects, such as lightning, friction electrification, electrostatic induction, electromagnetic induction, etc.
We all know about friction electrification, but rarely hear about contact electrification. Essentially, triboelectricity is a process of contact and separation resulting in an imbalance of positive and negative charges. Friction is a process of constant contact and separation. Therefore, friction electrification is essentially contact separation electrification. In everyday life, various objects can generate static electricity due to movement or friction.
The discovery and application of electricity greatly spared the physical and mental labor of human beings, enabled human powermaine to grow wings and allowed the tentacles of human information to continue to expand. The impact of electricity on human life has two aspects: the acquisition, transformation and transmission of energy, and the basis of electronic information technology. The discovery of electricity can be considered a revolution in the history of humanity. The kinetic energy it generates is continually released every day. The human demand for electricity is exaggerated to say that its role is nothing less than the oxygen of the human world. electricity, human civilization would still be alive. She will explore in the dark.
Regarding the question answered by Shandongzxc: “The melting point of tungsten alloy is very low. » Tungsten is the metal with the highest melting point. How can his alloy have a very low melting point? I fear it is to take advantage of its high hardness.
Quoting Longsox's answer elsewhere: "When the plain bearing is operating, a very thin film of oil is required between the bushing and the rotating shaft for lubrication. If this is due to poor lubrication, there is direct friction between the bushing and the rotating shaft, and the friction will generate high temperatures Although the bushing is made of a special high temperature resistant alloy, the high temperature is generated by direct friction is still enough to burn out the. device » p>.