A material that allows current to flow through it with no resistance is called a

A material that allows current to flow through it with no resistance is called a

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

Answer: (A)

Current flowing with no resistance describes a superconducting state. Ordinary conductors have some resistance because electrons scatter off atoms, turning part of the energy into heat. When a material becomes a superconductor (below a critical temperature), its resistance drops to essentially zero, so current can flow without energy loss. That’s why this option is the right one. The other terms describe different ideas: a conductor normally conducts with resistance, an insulator resists electricity, and a resistor is a circuit component designed to provide resistance. In practice, superconductivity occurs only at very low temperatures (with some materials known as high-temperature superconductors still requiring cooling well below room temperature).

Current flowing with no resistance describes a superconducting state. Ordinary conductors have some resistance because electrons scatter off atoms, turning part of the energy into heat. When a material becomes a superconductor (below a critical temperature), its resistance drops to essentially zero, so current can flow without energy loss. That’s why this option is the right one. The other terms describe different ideas: a conductor normally conducts with resistance, an insulator resists electricity, and a resistor is a circuit component designed to provide resistance. In practice, superconductivity occurs only at very low temperatures (with some materials known as high-temperature superconductors still requiring cooling well below room temperature).