Statement-I: By doping silicon semiconductor | vedclass

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

Question

(A) Statement-$I$ is true: When a pentavalent impurity (like Phosphorus or Arsenic) is added to a silicon semiconductor,each impurity atom provides on

Vedclass · Accepted Answer

Statement-$I$ is true but Statement-$II$ is false.

Vedclass · Answer

(A) Statement-$I$ is true: When a pentavalent impurity (like Phosphorus or Arsenic) is added to a silicon semiconductor,each impurity atom provides one extra free electron to the crystal lattice. This significantly increases the electron density,making it an $n$-type semiconductor.Statement-$II$ is false: Although an $n$-type semiconductor has a higher concentration of electrons (negative charge carriers),the semiconductor material itself remains electrically neutral. This is because the total number of positive charges (protons in the nuclei of the silicon and impurity atoms) is equal to the total number of negative charges (electrons) in the crystal lattice.

Statement-$I$: By doping silicon semiconductor with pentavalent material,the electron density increases.
Statement-$II$: The $n$-type semiconductor has a net negative charge.
In the light of the above statements,choose the most appropriate answer from the options given below:

Similar Questions

Which one of the following statements is true? $A$ p-type semiconductor is doped with

Pure $Si$ at $500\, K$ has equal number of electron $(n_e)$ and hole $(n_h)$ concentrations of $1.5 \times 10^{16}\, m^{-3}$. Doping by indium increases $n_h$ to $4.5 \times 10^{22}\, m^{-3}$. The doped semiconductor is of

Write briefly on $n$-type and $p$-type semiconductors.

In an $n$-type semiconductor, electrons are majority charge carriers and holes are minority charge carriers. The charge of an $n$-type semiconductor is

In an extrinsic semiconductor,the number densities of holes and electrons are ${N_p}$ and ${N_e}$ respectively. Then:

Vedclass Test Series

Exam Paper Generator

Online Exam Module

Statement-$I$: By doping silicon semiconductor with pentavalent material,the electron density increases.Statement-$II$: The $n$-type semiconductor has a net negative charge.In the light of the above statements,choose the most appropriate answer from the options given below: