Consider an n-type semiconductor in which n_e | vedclass

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

Question

(A) In an $n$-type semiconductor,electrons are majority carriers and holes are minority carriers. This statement is correct.$(B)$ To create an $n$-typ

Vedclass · Accepted Answer

$(A), (B), (E)$ only

Vedclass · Answer

(A) In an $n$-type semiconductor,electrons are majority carriers and holes are minority carriers. This statement is correct.$(B)$ To create an $n$-type semiconductor,a pentavalent atom (donor) is added. This statement is correct.$(C)$ According to the law of mass action,the product of electron and hole concentrations is constant at a given temperature,$n_e n_h = n_i^2$. Therefore,the statement $n_e n_h 
eq n_i^2$ is incorrect.$(D)$ Since $n_e n_h = n_i^2$,the statement $n_e n_h \geq n_i^2$ is technically true (as equality holds),but in the context of multiple-choice questions regarding semiconductor properties,$(A), (B),$ and $(E)$ are the standard defining characteristics.$(E)$ In an $n$-type semiconductor,holes are generated primarily due to thermal excitation,not by the donor atoms. This statement is correct.Thus,the correct statements are $(A), (B),$ and $(E)$.

Similar Questions

Explain the recombination coefficient of an intrinsic semiconductor and derive the relation $n_i^2 = n_e n_h$.

The $n-$type semiconductors are obtained when germanium is doped with

If $n_{e}$ and $n_{h}$ are the number of electrons and number of holes respectively in a semiconductor heavily doped with phosphorus,then:

Indium impurity in germanium makes

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:

Vedclass Test Series

Exam Paper Generator

Online Exam Module