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प्रश्न
Write a short note on superconductors?
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उत्तर
- The resistance of certain materials becomes zero below a certain temperature, known as critical or transition temperature.
- The materials that exhibit this property are known as superconductors and the phenomenon is known as superconductivity.
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संबंधित प्रश्न
If the potential difference across the ends of a conductor is 220 V and the resistance of the conductor is 44 Ω (ohm), then the current flowing through is _________.
- 0.2 A
- 0.5 A
- 2 A
- 5 A
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(i) negative resistance
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(b) volt
(c) coulomb
(d) ohm
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