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ICSE Class 10 Physics 2020 Paper

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Question : 49 of 67
Marks: +1, -0
What are superconductors?
Solution:  
Superconductors are the substances of zero resistance (or infinite conductance) at a very low temperature.
For e.g., Mercury below 4.2 K4.2\,\mathrm{K}, lead below 7⋅25 K7 \cdot 25\,\mathrm{K} etc.
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