What is the principle behind a photodiode? (2022)

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Question: What is the principle behind a photodiode? (2022)

Options:

Correct Answer: Photoelectric effect

Exam Year: 2022

Solution:

A photodiode operates on the principle of the photoelectric effect, where light generates electron-hole pairs.

What is the principle behind a photodiode? (2022)

What is the principle behind a photodiode? (2022)

Step 1: Understand that a photodiode is a device that detects light.
Step 2: Learn about the photoelectric effect, which is the process where light hits a material and causes it to release electrons.
Step 3: When light hits the photodiode, it generates pairs of electrons and holes (the absence of electrons).
Step 4: The movement of these electrons and holes creates an electric current.
Step 5: This electric current can be measured and is used to determine the intensity of the light.

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