What is the use of electricity?

Electricity is an easily transmitted form of energy, which can be used for rapidly increasing purposes in Japan. For example, the light bulb that appeared in the1870s has great practical value. Because of this invention, people no longer need to use candles or kerosene for lighting, thus avoiding many possible fires.

Telecommunication technology mainly relies on electricity to transmit information. Nowadays, two advanced technologies, optical fiber and communication satellite, occupy a large part of the communication technology market. The transmission technology they use is still based on the principle of electromagnetic waves.

Motor uses electromagnetic principle to convert electrical energy into mechanical energy to drive various machines. Stationary motors, like winches, can easily get energy. However, mobile motors, like electric cars, must carry energy equipment such as batteries with them, or use sliding contacts to obtain electricity like pantographs. This requirement limits its scope of action and working performance.

Extended data:

People who have been engaged in high-voltage live working for a long time now have headaches, nausea, fatigue and drowsiness everywhere. In schools built under high-voltage lines, teachers and students are often troubled by the same symptoms. It is found that there is a strong magnetic field on the high-voltage line, which can ionize the gas molecules around the line, resulting in a discharge phenomenon, which leads to a chemical reaction between oxygen and nitrogen in the air, resulting in the emergence of ozone and nitrogen oxides, which is harmful to human health and has adverse effects on other organisms.

The types of power pollution are:

Voltage fluctuation and instantaneous current, surge, harmonics, three-phase imbalance, eddy current, skin effect (that is, when alternating current passes through a conductor, current tends to flow on the surface of the conductor), excitation oscillation, radio frequency interference, resonance, line loss, copper loss, iron loss, etc.

Baidu encyclopedia-power pollution

Baidu encyclopedia-electricity