Which term describes a material that allows heat and electricity to pass through it?

• A. Capacitor
• B. Coaxial cable
• C. Conductor
• D. Circuit breaker

Answer: (C)

Materials that let both heat and electricity flow are conductors. In metals, free electrons move easily, carrying electric current, and those same electrons also transfer kinetic energy between atoms, so heat moves quickly through the material. That dual ability is what makes metals good conductors of both electricity and heat. A capacitor stores electrical energy, not a property of a material. A coaxial cable is a type of cable construction, not a material characteristic. A circuit breaker is a protective device that interrupts current. So the term for a material that allows heat and electricity to pass through it is conductor.