Which of the following factors provides a source of energy to excite electrons that move across a p-n junction?

Question

Which of the following factors provides a source of energy to excite electrons that move across a p-n junction?

Quizplus · Accepted Answer

Light is the factor that excites electrons in a p-n junction, leading to the generation of a current. This process is known as photovoltaic effect, and it is the principle behind solar cells. Heat or steam do not provide a direct source of energy to excite electrons in a p-n junction. Silicon is the material used to make p-n junctions, but it is not a source of energy. External current can be used to power a device that contains a p-n junction, but it is not the source of energy for the junction itself.

Which of the Following Factors Provides a Source of Energy to Excite