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