sigma_1 and sigma_2 are the electrical conduc | vedclass

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

Question

(B) $Ge$ (Germanium) is a semiconductor,and $Na$ (Sodium) is a metal.For semiconductors,the number of charge carriers increases significantly with an

Vedclass · Accepted Answer

$\sigma_1$ increases and $\sigma_2$ decreases

Vedclass · Answer

(B) $Ge$ (Germanium) is a semiconductor,and $Na$ (Sodium) is a metal.For semiconductors,the number of charge carriers increases significantly with an increase in temperature,leading to an increase in electrical conductivity ($\sigma_1$ increases).For metals,the increase in temperature leads to increased lattice vibrations (collisions),which increases the resistivity and consequently decreases the electrical conductivity ($\sigma_2$ decreases).Therefore,$\sigma_1$ increases and $\sigma_2$ decreases.

$\sigma_1$ and $\sigma_2$ are the electrical conductivities of $Ge$ and $Na$ respectively. If these substances are heated,then

Similar Questions

For a crystal system where $a = b = c$ and $\alpha = \beta = \gamma \neq 90^\circ$,the system is:

Assertion: If the temperature of a semiconductor is increased,then its resistance decreases.
Reason: The energy gap between the conduction band and the valence band is very small.

When radiation with a wavelength shorter than $2480 \, nm$ is incident on a semiconductor,its conductivity increases. The bandgap of this semiconductor is ....... $eV$.

The atomic number of silicon is $14$. Its ground state electron configuration is

Which of the following substances has an energy gap $(E_g)$ greater than $3 \ eV$?

Vedclass Test Series

Exam Paper Generator

Online Exam Module