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Variation of conductivity with temperature is shown by a simple experiment in which a current is sent through a metal and a semiconductor while heat is applied to each.
International Science Film Collection, Audio Visual Services, Pennsylvania State University, 201 Carnegie Building, 1127 Fox Hill Rd., University Park, PA 16802, Toll-free: 800-826-0132, URL: http://www.psu.edu
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Running time 9 minutes.
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