Grades 9-12: Students measure voltage across a copper resistor and a superconductor to observe the unusual effect of temperature on a superconductor vs. a "normal" conductor.
PHYSICAL SCIENCES (Grades 9-12)
Students measure the voltage across a copper resistor and a superconductor starting at room temperature and at intervals cooling down to approximately 77K. The temperature is controlled by varying the amount of thermal contact with liquid nitrogen. By graphing their results, the students see the effect of temperature on the resistance of a “normal” conductor, and the radically different effect on a superconductor. The lab ends with a demonstration of the Meissner Effect, a superconducting classic!
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