Which material stops the passage of electricity, heat, or sound from one conductor to another?

Which material stops the passage of electricity, heat, or sound from one conductor to another?

• A. Insulator
• B. Conductor
• C. Uncharged
• D. Attract

Answer: (A)

A material that stops the passage of electricity, heat, or sound between two bodies is an insulator. An insulator resists the flow of electricity, so electrons can’t move readily through it; it also slows or blocks heat transfer and dampens vibrations that carry sound. That combination is why rubber coating on wires protects us from shocks, thick walls or foam trap heat, and soft materials or barriers reduce noise transmission. The other options don’t fit: a conductor lets electric current move easily; being uncharged describes an electrical state, not a material property; and attract is a verb describing a force, not a material that blocks energy.

A material that stops the passage of electricity, heat, or sound between two bodies is an insulator. An insulator resists the flow of electricity, so electrons can’t move readily through it; it also slows or blocks heat transfer and dampens vibrations that carry sound. That combination is why rubber coating on wires protects us from shocks, thick walls or foam trap heat, and soft materials or barriers reduce noise transmission. The other options don’t fit: a conductor lets electric current move easily; being uncharged describes an electrical state, not a material property; and attract is a verb describing a force, not a material that blocks energy.