Which term describes a material that slows or stops the flow of heat or electricity?

Which term describes a material that slows or stops the flow of heat or electricity?

• A. Conductor
• B. Thermistor
• C. Insulator
• D. Resistor

Answer: (C)

A material that slows or stops the flow of heat or electricity is an insulator. Insulators have low ability to transfer heat and high resistance to electric current, so heat moves slowly through them and electric current doesn’t pass easily. This is why things like plastic, wood, and rubber are used to keep heat in or out and to keep wires from shocking us. A thermistor is a temperature-dependent resistor, and a resistor is a circuit component that limits current—both are specific parts or conditions, not general materials that reliably block energy transfer like insulators.

A material that slows or stops the flow of heat or electricity is an insulator. Insulators have low ability to transfer heat and high resistance to electric current, so heat moves slowly through them and electric current doesn’t pass easily. This is why things like plastic, wood, and rubber are used to keep heat in or out and to keep wires from shocking us. A thermistor is a temperature-dependent resistor, and a resistor is a circuit component that limits current—both are specific parts or conditions, not general materials that reliably block energy transfer like insulators.