A copper strip and a germanium strip are cool | vedclass

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

Question

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

Vedclass · Accepted Answer

the copper strip decreases and that of the germanium increases.

Vedclass · Answer

(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:

Similar Questions

Write the electronic configuration of $Si$ and $Ge$.

State the conductivity and resistivity of a semiconductor.

Choose only the false statement from the following:

The electrons in the conduction band of a semiconductor are called .......

The energy gap of silicon is $1.14 \ eV$. The maximum wavelength at which silicon will begin absorbing energy is

Vedclass Test Series

Exam Paper Generator

Online Exam Module