Insulator is a material that does not allow electrical current to flow through it; examples rubber, plastic, glass.

Insulator is a material that does not allow electrical current to flow through it; examples rubber, plastic, glass.

• A. Load
• B. Conductor
• C. Grounding
• D. Insulator

Answer: (D)

Materials that don’t allow current to flow are insulators. They have high resistivity and tightly bound electrons, so current moves very little unless voltage is extreme enough to cause breakdown. Rubber, plastic, and glass are classic examples and are used to insulate and protect people and equipment. In contrast, a conductor lets current flow easily, a load is a device that uses electrical energy, and grounding provides a safety path to earth. So the description best fits an insulator.

Materials that don’t allow current to flow are insulators. They have high resistivity and tightly bound electrons, so current moves very little unless voltage is extreme enough to cause breakdown. Rubber, plastic, and glass are classic examples and are used to insulate and protect people and equipment. In contrast, a conductor lets current flow easily, a load is a device that uses electrical energy, and grounding provides a safety path to earth. So the description best fits an insulator.