Which two statements correctly describe the role of a semiconductor in a
solar cell?
I A. When the semiconductors become charged, current flows from
the negative one to the positive one.
B. The electrons freed from the semiconductors by light exit the cell
and never return.
I C. When photons are absorbed, electrons from the semiconductor
are freed because of the photoelectric effect.
D. When the semiconductors become charged, current flows from
the positive one to the negative one.

Question

04-01-2021
Physics

Answered

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Which two statements correctly describe the role of a semiconductor in a
solar cell?
I A. When the semiconductors become charged, current flows from
the negative one to the positive one.
B. The electrons freed from the semiconductors by light exit the cell
and never return.
I C. When photons are absorbed, electrons from the semiconductor
are freed because of the photoelectric effect.
D. When the semiconductors become charged, current flows from
the positive one to the negative one.

Sagot :

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missmalliebliss missmalliebliss · Answer 1 · 2021-01-04T17:43:16-05:00

missmalliebliss missmalliebliss

04-01-2021

Answer:

It's A and C

Answer Link

poojatomarb76 poojatomarb76 · Answer 2 · 2022-03-09T00:35:35-05:00

Options A and C are correct.

A. When the semiconductors become charged, current flows from the negative one to the positive one

C. When photons are absorbed, electrons from the semiconductor are freed because of the photoelectric effect.

What are semiconductors?

Semiconductors are materials with conductivity intermediate between conductors and nonconductors or insulators. Semiconductors may be either compound like gallium arsenide.

(A)When the semiconductors become charged, current flows from the negative one to the positive one

Reason: Current flow in a semiconductor is caused by charge carrier migration in both the conduction and valence bands.

Electrons are mobile charges in the conduction band while holes are mobile charges in the valence band. Drift current occurs in the presence of an electric field,

which creates a net motion of positively charged carriers in the same direction as the field and negatively charged carriers in the opposite direction as a result of the force.

(C)When photons are absorbed, electrons from the semiconductor are free because of the photoelectric effect.

Reason: The photoelectric effect is the creation of a current when the light of a specific frequency strikes a surface, which is commonly metallic or semiconducting.

The current is produced when electrons are jolted out of their stable states by the energy transferred from an incoming photon.

The minimum frequency or energy need indicates the varying energy necessary to release an electron from a specific surface, which varies depending on the atomic configuration of the material.

The outermost electrons in metals are not bonded to each atom which is shared by many atoms. This decentralization is what allows metals to conduct electric currents.

Hence options A and C are correct.

To learn more about the semiconductors refer to the link;

https://brainly.com/question/1476674

Sagot :

What are semiconductors?

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