Question

In a solar cell, current is generated due to bond breakage in which region?
A) Depletion region
B) n-region
C) p-region
D) None of these

Answer 1

Hint: To answer this question, we must know the working of a solar cell. A solar cell is made from a p-n junction diode, a semiconductor device, which facilitates the complete flow of electrons in one direction only. From this, it will be possible to answer the question.

Complete step by step solution:
A solar cell is made from a p-n junction, a semiconductor device. The p-n junction works as following, a p-n junction has three sections:
1. p - region
2. Depletion region
3. n - region
When an external field is applied to this p-n junction, the atoms in the depletion regions emit their electrons, and an electron-hole pair is generated. The holes go to the p - region and the electrons go to the n - region.

In the case of the solar cell, sunlight falls on the cell, the atoms in the depletion region emit the electrons, and the electrons - hole pair is generated. The holes go to the p - region and the electrons go to the n - region.
Hence, the bond is broken in the depletion region.

Therefore, the correct option is (A) Depletion region.

Note: In all these kinds of questions, we must be knowing the basic substance from which an appliance is made, and then we must know the working of that substance. The current is not generated by the breaking of the bond, it is actually generated by the movement of the electrons and hole generated due to the bond breakage.