Q. Superconductors are substances that__:
Answer: offer minimum resistance to flow of electric current
Notes: A superconductor is a material that can conduct electricity with no resistance. No heat, sound or any other form of energy is released from the material when it reaches the temperature at which it becomes superconductive. A substance achieves superconductivity at very low temperature, almost close to absolute temperature of -273K. At present there is none in practical us age.

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