Multiple choice

Superconductors are those elements

  1. whose conductivity is intermediate between metals and insulators

  2. whose resistance falls almost to zero at very low temperatures

  3. which turn into insulators at very low temperatures

  4. which conduct electricity only at very high temperatures
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Superconductors are materials that exhibit zero electrical resistance and expulsion of magnetic fields when cooled below a characteristic critical temperature. This allows electricity to flow without any energy loss.

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