Q.45. In a semiconductor p-n diode, the doping concentrations on p-side and n-side are atoms/cm³ an

Q: What is the correct answer for JEE Main Physics Q45?

The correct answer is B. In a p-n junction diode, the depletion region extends more into the lightly doped side. The doping concentration on the p-side ($N_A$) is $10^{15}$ atoms/cm³ and on the n-side ($N_D$) is $10^{17}$ atoms/cm³. Since $N_A < N_D$, the p-side is more lightly doped than the n-side. Therefore, the depletion region width will be greater on the p-side compared to the n-side. Let $W_p$ be the width of the d

Q: Q.45. In a semiconductor p-n diode, the doping concentrations on p-side and n-side are atoms/cm³ and atoms/cm³, respectively. Which one of the following statement is true?

The correct answer is B. In a p-n junction diode, the depletion region extends more into the lightly doped side. The doping concentration on the p-side ($N_A$) is $10^{15}$ atoms/cm³ and on the n-side ($N_D$) is $10^{17}$ atoms/cm³. Since $N_A < N_D$, the p-side is more lightly doped than the n-side. Therefore, the depletion region width will be greater on the p-side compared to the n-side. Let $W_p$ be the width of the d

Q: What are the options for this JEE Main Physics question?

A. Widths of depletion region on either side of the interface are equal · B. The depletion region width is more on p-side compared to that in n-side · C. The depletion region width is more on n-side compared to that in p-side · D. No depletion region forms because of unequal doping concentrations on p and n-sides

Question

Q.45. In a semiconductor p-n diode, the doping concentrations on p-side and n-side are  atoms/cm³ and  atoms/cm³, respectively. Which one of the following statement is true?

FirstInTest · Accepted Answer

In a p-n junction diode, the depletion region extends more into the lightly doped side. The doping concentration on the p-side ($N_A$) is $10^{15}$ atoms/cm³ and on the n-side ($N_D$) is $10^{17}$ atoms/cm³.
Since $N_A < N_D$, the p-side is more lightly doped than the n-side. Therefore, the depletion region width will be greater on the p-side compared to the n-side.
Let $W_p$ be the width of the depletion region on the p-side and $W_n$ be the width on the n-side. Then $N_A W_p = N_D W_n$. Since $N_A < N_D$, it implies $W_p > W_n$.

Answer

Widths of depletion region on either side of the interface are equal

Answer

The depletion region width is more on p-side compared to that in n-side

Answer

The depletion region width is more on n-side compared to that in p-side

Answer

No depletion region forms because of unequal doping concentrations on p and n-sides

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