That is, does an insulator become a conductor?

Not an insulator.

It becomes a conductor, but the insulator has a limited ability to withstand voltage, for example, air, which is insulated under normal fine conditions, and when the voltage reaches a certain level, air will be broken down and conducted. But when the voltage decreases, the air ceases to conduct electricity.

This is similar to the case of dams, where a dam can fail when the water level exceeds the pressure the dam can handle.

For insulating materials.

Different materials are subjected to different voltages, and at the same time, different conditions are also different, for example, glass, which is insulated at room temperature, can conduct electricity at high temperatures.

The voltage of household appliances is 220 volts, because higher than 220 volts exceeds the body's tolerance limit, which can cause death. High pressure can be directly fatal and even scorch.

Insulators, conductors are relative, not absolute. Like dry wood is an insulator, wet wood is a conductor, and other materials can change under special conditions. So pay attention to electricity safety.

Absolute bodies are determined by the properties of their substances to be non-conductive.

If the voltage is too high, the insulator can break down, and the process of its breakdown will carbonize the material in the breakdown channel due to heating and combustion, and cause a short circuit. But as far as the whole absolute body is concerned, it does not become a conductor.

The same is true when lightning strikes through an object.

The so-called insulator is only a relative concept, and the insulator will become a conductor under certain conditions (voltage level, dryness and wetness, frequency, etc.). Such as lightning arresters, dry wooden strips, stools, etc.

Insulators become conductors under certain circumstances.

An insulator is a substance that does not normally conduct an electric current, also known as a dielectric. They have extremely high resistivity.

A conductor is a substance that has a very low resistivity and is prone to conducting electric current. The presence of a large number of freely moving charged particles in a conductor is called a carrier. Under the action of the external electric field, the carriers move in a directional manner, forming an obvious current.

Insulators can be divided into three categories: gaseous (such as hydrogen, oxygen, nitrogen and all gases in the non-balanced macro separation state), liquid (such as pure water, oil, lacquer and organic acids, etc.) and solid (such as glass, ceramics, rubber, paper, quartz, etc.).

The actual insulator is not completely non-conductive, under the action of a strong electric field, the positive and negative charges inside the insulator will break free from the bondage and become free charges, and the insulation properties will be destroyed, this phenomenon is called dielectric breakdown. The maximum electric field strength that a dielectric material can withstand is called the breakdown field strength.

Insulators and conductors, there are no absolute boundaries. Insulators can be converted into conductors under certain conditions.

The reason for conducting electricity: Whether it is a solid or a liquid, if there are electrons or ions inside it that can move freely, then it can conduct electricity. There is no free-moving charge, and under certain conditions, conductive particles can be produced, then it can also become a conductor.

1. Conductor refers to a substance with very low resistivity and easy to conduct current. There are a large number of scrambled pin in the conductor and the freely moving charged particles are called carriers. Under the action of the external electric field, the carriers move in a directional manner, forming an obvious current.

2. Insulator, also known as dielectric, is a material that hinders the flow of charge in the stool and hinders the flow of the stool. In an insulator, valence band electrons are tightly bound around their atoms. This material is used as an insulator, or insulation, in electrical equipment.

Its function is to support or separate the individual electrical conductors and prevent the current from flowing.

The human body is a conductor. Because the human body contains a large number of water molecules and metal ions, especially the blood has the highest amount of iron. In addition, it also contains many other trace particles of metallic and non-metallic substances.

It can be said that the human body is mainly a large chemical molecular organism made up of carbohydrates. If the human body approaches the two positive and negative ends of the electric field, the conductive particles in the human body will form electrons under the action of the electric field force.

Conductors: The presence of a large number of freely moving charged particles in a conductor is called a carrier. Under the action of the electric field outside the rock, the carriers move directionally to form an obvious current.

Metals are the most common type of conductor. The outermost valence electrons of metal atoms easily break free from the nucleus and become free electrons, leaving behind positive ions to form regular lattices. The concentration of free electrons in metals is large, so the electrical conductivity of metal conductors is usually greater than that of other conductor materials.

The resistivity of a metal conductor generally decreases as the temperature decreases. At very low temperatures, the resistivity of certain metals and alloys disappears and is transformed into "superconductors".