261. Super conductivity is a phenomenon in which the resistance of a substance

A. increases with temperature
B. decreases with temperature
C. does not change with temperature
D. becomes zero at very low temperature
✅ The correct answer is option D.
Super conductivity is a phenomenon in which the resistance of a substance becomes zero at very low temperature. Superconductors are solids that at low temperatures exhibit zero resistance to the flow of electrical current, a phenomenon known as superconductivity. The temperature at which the electrical resistance of a substance drops to zero is its superconducting transition temperature (T c).

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