What do you call a material that does not allow the passage of an electrical current?

The term used to describe a material that does not allow the passage of an electrical current is "insulators." Insulators are substances that provide a barrier to the flow of electricity. This characteristic is crucial in various applications, especially in the electrical and electronics industries, where it is important to prevent unwanted current flow. Common examples of insulators include rubber, glass, and plastic, which are used to cover wires and components to protect against electric shock and prevent short circuits.

In contrast, conductors are materials that facilitate the flow of electrical current, semiconductors have properties that lie between conductors and insulators, allowing them to conduct electricity under certain conditions, and electrolytes are substances that conduct electricity when dissolved in water or melted, as they contain free ions. Understanding these differences is essential for anyone studying electrology and related fields.