Assertion: The number of electrons in a p-typ | vedclass

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

Question

(A) According to the law of mass action,for a semiconductor,the product of the number density of electrons $(n_e)$ and holes $(n_h)$ is constant at a

Vedclass · Accepted Answer

If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

Vedclass · Answer

(A) According to the law of mass action,for a semiconductor,the product of the number density of electrons $(n_e)$ and holes $(n_h)$ is constant at a given temperature: $n_e n_h = n_i^2$,where $n_i$ is the intrinsic carrier concentration.In a $p-$type semiconductor,trivalent impurity atoms are added,which significantly increases the number of holes $(n_h > n_i)$.Since the product $n_e n_h$ must remain equal to $n_i^2$,an increase in $n_h$ leads to a decrease in the number of electrons $(n_e)$ such that $n_e = n_i^2 / n_h$. Since $n_h > n_i$,it follows that $n_e Therefore,the number of electrons in a $p-$type semiconductor is less than the number of electrons in an intrinsic (pure) semiconductor at the same temperature.Both the Assertion and the Reason are correct,and the Reason correctly explains the Assertion.

Assertion: The number of electrons in a $p-$type silicon semiconductor is less than the number of electrons in a pure silicon semiconductor at room temperature.
Reason: It is due to the law of mass action.

Similar Questions

In a $P$-type semiconductor,there is

In an $n-$type semiconductor,which of the following statements is true?

When phosphorus and antimony are mixed in germanium,then:

Why are elemental dopants for Silicon or Germanium usually chosen from group $XIII$ or group $XV$?

In a $P$-type semiconductor, the acceptor level is $57 \text{ meV}$ above the valence band. What is the maximum wavelength of light (in $\mathring{A}$) required to create a hole?

Vedclass Test Series

Exam Paper Generator

Online Exam Module

Assertion: The number of electrons in a $p-$type silicon semiconductor is less than the number of electrons in a pure silicon semiconductor at room temperature.Reason: It is due to the law of mass action.