The resistance of a conductor at absolute zero (0K) is:
Correct answer: A. Almost zero
- A. Almost zero
- B. Almost infinite
- C. No prediction at all
- D. May increase or decrease
Explanation
The resistance of a conductor at absolute zero (0K) is almost zero. This phenomenon is known as zero or near-zero resistance, and it occurs in materials with special properties called superconductors.Superconductors are materials that exhibit zero electrical resistance below a critical temperature. At temperatures close to absolute zero, the thermal energy becomes extremely low, and the probability of electron-impurity or electron-phonon scattering is greatly reduced. As a result, the resistance of the superconductor diminishes significantly, approaching zero.
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About Current Electricity
Steady current relates charge flow to potential difference, resistance and resistivity, including how temperature changes a conductor's resistance. Sources with internal resistance have terminal voltage below their emf when delivering current, and maximum power output occurs under a specific load condition rather than at zero resistance.
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