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In a superconducting material, the critical temperature is the temperature at which:
The material becomes a perfect conductor
The material begins to conduct electricity without resistance
The material loses all its magnetic properties
The material becomes transparent to electromagnetic radiation
Answers (1)
Superconductivity is a phenomenon where a material conducts electricity without any resistance when it is cooled below a certain temperature, known as the critical temperature . Option (B) correctly describes the critical temperature as the temperature at which the material begins to conduct electricity without resistance. Option (A) is incorrect as a perfect conductor has zero resistance at all temperatures. Option (C) is incorrect as superconducting materials can retain their magnetic properties even at low temperatures. Option (D) is incorrect as becoming transparent to electromagnetic radiation is not a characteristic of superconducting materials.
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