Is insulation conductive?

Is insulation conductive?

• A. Sometimes
• B. True
• C. Unknown
• D. False

Answer: (D)

The main idea being tested is whether insulation allows electrical current to flow. Insulation is chosen for its high electrical resistance, meaning there are very few free charge carriers to carry current. In practical terms, a good electrical insulator blocks the flow of electricity under normal conditions, so it is non-conductive. Only when conditions break down the material—such as excessive voltage causing breakdown, or contamination like moisture increasing conductivity—would it start to conduct. So insulation is not conductive, which is why the statement is false.

The main idea being tested is whether insulation allows electrical current to flow. Insulation is chosen for its high electrical resistance, meaning there are very few free charge carriers to carry current. In practical terms, a good electrical insulator blocks the flow of electricity under normal conditions, so it is non-conductive. Only when conditions break down the material—such as excessive voltage causing breakdown, or contamination like moisture increasing conductivity—would it start to conduct. So insulation is not conductive, which is why the statement is false.