Why does the plastic bar live against friction with the silk? The metal bar is not electrified with the silk
Friction electrification is the result of the transfer of electrons from one object to another, causing two objects to carry the same amount of charge. Electrons that are charged are negatively charged; electrons that lose electrons are positively charged. As a result, when two electrically charged objects do not rub electricity, the electricity they carry is necessarily equal in number. An object that rubs attracts small light objects.
(1) objects that are rubbed against each other are made of different substances. The atoms of the same substance check the binding power of the outer electrons are the same, without the loss of electrons, so it is impossible to power them.(2) the two bodies that rub electricity should be insulated from the outside. If the hand holding the metal rod to friction and other objects, the metal rod is not charged, this is because the metal, human body, the earth is a conductor, the metal rod friction on the belt to pass through the human body electric earth, so the metal rods are not charged.To make the two materials rub each other into electricity, two different kinds of materials with significant difference in binding ability are rubbed against each other, which is easier to power up and bring more electricity. Fur and rubber bars, satin and glass sticks, produce more static electricity in an air drying environment.The common physical constraints of electronic technology from weak to strong order: < < < mica glass fur wool nylon silk < < < < < < hard rubber metal sulfur rosin. In the substance listed above, the more friction between the two substances, the more likely the electrification is.
When two objects rub against each other, because the nuclei of different objects bind different nuclei, there must be one object losing some electrons and the other getting extra electrons. If a glass rod is rubbed against the silk, some electrons of the glass rod are transferred to the silk. The rod is positively charged by the loss of electrons, and the silk is negatively charged with electrons. Friction with a rubber stick, and some of the fur's electrons are transferred to the rubber bar. The fur is positively charged and the rubber bar is negatively charged.
Modern science tells us that any object is made up of atoms, and that atoms are made up of positively charged nuclei and negatively charged electrons, which move around the nucleus. Under normal circumstances, the number of positive charges in the nucleus is equal to the number of negative charges in the outer electron band, and the atom is electrically neutral, so the whole object is neutral. In the nucleus, the number of positive charges is difficult to change, while the outer electrons are removed from the nucleus and transferred to another, so that the number of negative charges in the outer electron band changes. When an object loses electrons, the total negative charge of its electron band is less than the positive charge of the nucleus; it shows a positive charge; on the contrary, it is a neutral object that exhibits negative charge when electrons are obtained.
