To prevent electric current from flowing, you would use:

To prevent electric current from flowing, you would use:

• A. Insulator
• B. Conductor
• C. Wire
• D. Metal

Answer: (A)

Electric current moves more easily through materials that are conductors. An insulator resists that movement by keeping electrons tightly bound, giving high resistance and blocking or greatly slowing current. That’s why insulating materials are used to cover wires and protect people. A conductor, such as most metals, lets current flow, so it wouldn’t prevent it. A wire is typically a metal conductor, and metal as a group is usually conductive, not insulating. So the best choice to prevent current is the insulator.

Electric current moves more easily through materials that are conductors. An insulator resists that movement by keeping electrons tightly bound, giving high resistance and blocking or greatly slowing current. That’s why insulating materials are used to cover wires and protect people. A conductor, such as most metals, lets current flow, so it wouldn’t prevent it. A wire is typically a metal conductor, and metal as a group is usually conductive, not insulating. So the best choice to prevent current is the insulator.