(D) Copper is a conductor (metal). For metals,the resistance decreases as the temperature decreases because the lattice vibrations (collisions) decrea

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

germanium increases,copper decreases

(D) Copper is a conductor (metal). For metals,the resistance decreases as the temperature decreases because the lattice vibrations (collisions) decrease.Germanium is a semiconductor. For semiconductors,the resistance increases as the temperature decreases because the number of charge carriers (electrons and holes) decreases significantly due to the reduction in thermal energy.

Class 12 Physics Semiconductor Electronics Classification of Materials and Energy Band Theory

Easy

Copper and Germanium are cooled from room temperature to $100 \ K$. Then,the resistance of

KCET 2012 All KCET

A
germanium increases,copper increases
B
germanium decreases,copper increases
C
germanium decreases,copper decreases
D
germanium increases,copper decreases

Explore More

Browse All

Question Bank

All Subjects

Class 12 Questions

Class 12

Physics Questions

Chapter

Semiconductor Electronics

Subtopic

Classification of Materials and Energy Band Theory

Previous Year

KCET 2012 Paper All KCET years →

The energy of a photon of sodium light $(\lambda = 589 nm)$ is equal to the band gap of a semiconductor material. Find the value of $E/kT$ at $300 K$.

Medium

View Solution

If the lattice constant of this semiconductor decreases,which of the following is true?

Medium

View Solution

$A$ solid which is not transparent to visible light and whose conductivity increases with temperature is formed by

EasyAIEEE 2006

View Solution

The intrinsic semiconductor becomes an insulator at

Easy

View Solution

Is the ionisation energy of an isolated free atom different from the ionisation energy for the atoms in a crystalline lattice?

Easy

View Solution

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial

For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free

For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo

Copper and Germanium are cooled from room temperature to $100 \ K$. Then,the resistance of

Similar Questions

The energy of a photon of sodium light $(\lambda = 589 nm)$ is equal to the band gap of a semiconductor material. Find the value of $E/kT$ at $300 K$.

If the lattice constant of this semiconductor decreases,which of the following is true?

$A$ solid which is not transparent to visible light and whose conductivity increases with temperature is formed by

The intrinsic semiconductor becomes an insulator at

Is the ionisation energy of an isolated free atom different from the ionisation energy for the atoms in a crystalline lattice?

Vedclass Test Series

Exam Paper Generator

Online Exam Module