There is interaction between charges, so it takes some work to form a certain charge system. The work required to transfer two point charges at infinity together to form a static system composed of two charges is called interaction energy. The interaction energy of an electrostatic system composed of n point charges is
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Energy conversion:
The electric energy used in daily life mainly comes from other forms of energy conversion, including hydropower, internal energy (commonly known as thermal energy and thermal power generation), atomic energy (atomic energy generation), wind energy (wind power generation), chemical energy (batteries) and light energy (photovoltaic cells, solar cells, etc. ). Electric energy can also be converted into other required forms of energy.
It can be wired or wireless for long-distance transmission. (A little information: In 2000, the total power generation of thermal power, hydropower and nuclear power in China reached 65.438+35.56 million kWh, ranking second in the world.
The proportion of installed power generation in China is 73% for coal power, 0/4.6% for hydropower, 2.4% for nuclear power, 2.3% for gas power and 7.7% for others. Electrical appliances are devices that use electric energy to work. When it is connected to a power supply, it can convert electric energy into the energy we need.
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