Q16. During the p-n junction formation, when an electron diffuses from nn → p, it leaves behind an:

Q: What is the correct answer for CUET UG Physics Q16?

The correct answer is b. In the formation of a p-n junction, the n-type semiconductor is doped with donor impurities (e.g., phosphorus or arsenic, which are Group 5 elements). These donor atoms contribute free electrons to the conduction band. When a free electron from the n-side diffuses across the junction to the p-side, the donor atom from which it originated is left behind. This donor atom, having lost an electron, be

Q: Q16. During the p-n junction formation, when an electron diffuses from nn → p, it leaves behind an: (a) ionised acceptor on n-side (b) ionised donor on n-side (c) ionised donor on p-side (d) ionised…

The correct answer is b. In the formation of a p-n junction, the n-type semiconductor is doped with donor impurities (e.g., phosphorus or arsenic, which are Group 5 elements). These donor atoms contribute free electrons to the conduction band. When a free electron from the n-side diffuses across the junction to the p-side, the donor atom from which it originated is left behind. This donor atom, having lost an electron, be

Q: What are the options for this CUET UG Physics question?

A. ionised acceptor on n-side · B. ionised donor on n-side · C. ionised donor on p-side · D. ionised donor on n-side and p-side both

Question

Q16. During the p-n junction formation, when an electron diffuses from nn → p, it leaves behind an:
(a) ionised acceptor on n-side
(b) ionised donor on n-side
(c) ionised donor on p-side
(d) ionised donor on n-side and p-side both

FirstInTest · Accepted Answer

In the formation of a p-n junction, the n-type semiconductor is doped with donor impurities (e.g., phosphorus or arsenic, which are Group 5 elements). These donor atoms contribute free electrons to the conduction band. When a free electron from the n-side diffuses across the junction to the p-side, the donor atom from which it originated is left behind. This donor atom, having lost an electron, becomes a positively charged, immobile ion on the n-side. These immobile positive ions form the positive space-charge region (or depletion region) on the n-side of the junction. Acceptor ions (negatively charged) are formed on the p-side. Therefore, an electron diffusing from n to p leaves behind an ionized donor on the n-side. Options (a), (c), and (d) are incorrect because acceptor ions are on the p-side, and donor ions are left on the n-side.

Answer

ionised acceptor on n-side

Answer

ionised donor on n-side

Answer

ionised donor on p-side

Answer

ionised donor on n-side and p-side both

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