The earliest discovered elementary particle electron is negatively charged, and its electric quantity is1.602176634×10-19 coulomb, which is the smallest unit of electric quantity and its mass is 9.10956×10. 1897 was discovered by British physicist Thomson Joseph John when he was studying cathode rays. All atoms consist of a positively charged nucleus and many electrons moving around it.

The directional movement of electric charge forms an electric current, such as that in a metal wire. Using electric and magnetic fields, the movement of electrons (in solid and vacuum) can be controlled according to needs, so as to manufacture various electronic instruments and components, such as various electron tubes and electron microscopes. The crystal diffraction experiment in 1927 confirmed the fluctuation of electrons.

Extended data:

Development history of electronic products;

Electronic technology is a new technology developed in western countries such as Europe and America at the end of 19 and the beginning of the 20th century. It was first invented by American Morse in 1837, American alexander bell in 1875 and British physicist Fleming in 1902. Electronic products developed most rapidly and were widely used in the 20th century, and became an important symbol of the development of modern science and technology.

The first generation of electronic products centered on electron tubes. At the end of 1940s, the first semiconductor transistor was born in the world. It has been adopted by many countries because of its small size, portability, power saving and long service life, and has replaced electron tubes in a large range. At the end of 1950s, the first integrated circuit appeared in the world, which integrated many electronic components such as transistors on a silicon chip, making electronic products more miniaturized.

Integrated circuits have developed rapidly from small integrated circuits to large-scale integrated circuits and ultra-large-scale integrated circuits, thus making electronic products develop in the direction of high efficiency, low power consumption, high precision, high stability and intelligence.

Because the four stages of the development of electronic computers can fully explain the characteristics of the four stages of the development of electronic technology, the following four eras of the development of electronic computers will explain the characteristics of the four stages of the development of electronic technology.

Baidu encyclopedia-electronic products

Baidu Encyclopedia-Electronic Edition