Which of the following defines an insulator?

An insulator is defined as a material that does not allow electric current to flow through it easily. This characteristic is essential for various applications in electrical systems, where preventing the flow of electricity is critical for safety and functionality. Insulators are typically made from materials like rubber, glass, or plastic, which have high resistance to electrical flow.

They serve to protect conductors, support the electrical components, and ensure that electric currents flow only where intended, thus helping to prevent short circuits and electrical hazards. In contrast, materials that easily conduct electricity or allow current to pass through are known as conductors, and are not suitable for the roles and functions that insulators fulfill in electrical systems.