Which term describes a material that has zero electrical resistance under certain conditions?

Which term describes a material that has zero electrical resistance under certain conditions?

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

Answer: (B)

Superconductivity is the phenomenon where certain materials have zero electrical resistance when cooled below a critical temperature. In this special state, electric current can flow without energy loss, which is why a material with this property is called a superconducting material. In contrast, an insulator resists electric current completely and doesn’t conduct, a conductor allows current to flow with some resistance, and a resistor is a component designed to limit current. The key idea is that zero resistance occurs only under those specific conditions, which uniquely identifies a superconductor.

Superconductivity is the phenomenon where certain materials have zero electrical resistance when cooled below a critical temperature. In this special state, electric current can flow without energy loss, which is why a material with this property is called a superconducting material. In contrast, an insulator resists electric current completely and doesn’t conduct, a conductor allows current to flow with some resistance, and a resistor is a component designed to limit current. The key idea is that zero resistance occurs only under those specific conditions, which uniquely identifies a superconductor.