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प्रश्न
A conductor at 4.2 K is found to offer no resistance. Such a conductor is called:
पर्याय
zero conductor
superconductor
absolute conductor
none of these
MCQ
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उत्तर
Superconductor
Explanation:
A substance whose resistance becomes zero below a certain temperature is called a superconductor. Mercury at 4.2 K behaves this way. Zero conductor and absolute conductor are not standard terms.
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