Current Electricity and Electrical InstrumentMedium
Question
A piece of copper and another of germanium are cooled from room temperature to 80 K. The resistance of :
Options
A.each of the them increases
B.each of the them increases
C.copper increases and germanium decreases
D.copper decreases and germanium increases
Solution
Copper is metal and germanium is semiconductor. Resistance of a metal decreases and that of a semiconductor increases with decrease in temperature.
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