If pieces of copper and germanium are cooled | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) Copper is a conductor (metal). For metals,resistance decreases as temperature decreases because the number of collisions between electrons and lat

Vedclass · Accepted Answer

Decrease for copper and increase for germanium.

Vedclass · Answer

(C) Copper is a conductor (metal). For metals,resistance decreases as temperature decreases because the number of collisions between electrons and lattice ions decreases.Germanium is a semiconductor. For semiconductors,resistance increases as temperature decreases because the number of charge carriers (electrons and holes) decreases exponentially with temperature.Therefore,when cooled to $77 \ K$,the resistance of copper decreases and the resistance of germanium increases.

If pieces of copper and germanium are cooled from room temperature to $77 \ K$,their resistance will:

Similar Questions

The resistivity of a semiconductor depends upon

Carbon, silicon, and germanium have four valence electrons each. At room temperature, which one of the following statements is most appropriate?

In semiconductors at room temperature,

If the energy gap of a substance is $5.4 \ eV$,then the substance is

$A$ piece of copper and another of germanium are cooled from room temperature to $80\, K$. The resistance of :-

Vedclass Test Series

Exam Paper Generator

Online Exam Module