A copper strip and a germanium strip are cool | vedclass

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(C) Copper is a metal (conductor),and germanium is a semiconductor.For conductors,the resistance decreases as the temperature decreases because the sc

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the copper strip decreases and that of the germanium increases.

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(C) Copper is a metal (conductor),and germanium is a semiconductor.For conductors,the resistance decreases as the temperature decreases because the scattering of electrons by lattice vibrations reduces.For semiconductors,the resistance increases as the temperature decreases because the number of free charge carriers (electrons and holes) decreases significantly due to the reduction in thermal excitation.Therefore,when cooled to $80 \ K$,the resistance of the copper strip decreases,and the resistance of the germanium strip increases.

$A$ copper strip and a germanium strip are cooled to $80 \ K$ from room temperature. The resistance of:

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