What is the function of an insulator in electrical systems?

An insulator is a material that prevents the flow of electric current between conductors. This characteristic is essential in electrical systems where safe and effective operation relies on controlling where current can and cannot flow. For example, insulators are used to coat wires and ensure that electricity travels along the intended pathway without leaking to unintended areas, which could cause short circuits or electrical shocks.

Insulators, such as rubber, glass, and certain plastics, possess high resistivity, meaning they do not allow electric charge to move freely. This property is crucial for maintaining safety in electrical applications, ensuring that conductors do not inadvertently touch each other or create hazardous conditions.

In contrast, other options involve increasing current flow or enhancing conductivity, which is not the role of an insulator. The function of providing a path for electric current to flow is also contradictory to what an insulator does, as that role is designated for conductors instead. Understanding the distinct function of insulators is vital to ensuring proper electrical system design and safety.