As an expert in the field of physics, particularly in the area of electricity and materials science, I can provide you with an accurate answer to your question.
Resistivity is a property of a material that opposes the flow of electric current. It is a measure of how strongly a material opposes the passage of electric current. Materials that resist electric current are called
insulators. Some common insulators include rubber, glass, plastic, and air. These materials have high resistivity and do not allow electric current to flow through them easily.
On the other hand, materials that allow electric current to flow through them with relative ease are called
conductors. Metals, such as copper, silver, and aluminum, are good examples of conductors. They have low resistivity and are used in electrical wiring and components because they allow current to flow with minimal resistance.
There is also a category of materials known as
semiconductors, which have electrical conductivity between that of a conductor and an insulator. Silicon and germanium are common semiconductors. They are used in electronic devices because their conductivity can be controlled and enhanced through various methods, such as doping.
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