A material that does not allow electrons to move easily through it.

A material that does not allow electrons to move easily through it.

• A. Electrical Conductor
• B. Semiconductor
• C. Electrical Insulator
• D. Magnetic Material

Answer: (C)

Electrical conductivity depends on how freely electrons can move. An insulator has high resistivity, with electrons tightly bound and not free to move, so very little current flows under normal conditions. That means the material described blocks electron movement, making it an electrical insulator. Rubber, plastic, and glass are common examples and are used to insulate wires. Conductors let electrons move easily; semiconductors allow intermediate movement; magnetic materials relate to magnetism rather than how easily electrons flow in a circuit.

Electrical conductivity depends on how freely electrons can move. An insulator has high resistivity, with electrons tightly bound and not free to move, so very little current flows under normal conditions. That means the material described blocks electron movement, making it an electrical insulator. Rubber, plastic, and glass are common examples and are used to insulate wires. Conductors let electrons move easily; semiconductors allow intermediate movement; magnetic materials relate to magnetism rather than how easily electrons flow in a circuit.