Understanding Motor Controls
4th Edition
ISBN: 9781337798686
Author: Stephen L. Herman
Publisher: Delmar Cengage Learning
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Chapter 20, Problem 1RQ
List the three major categories of photodetectors.
Expert Solution & Answer
To determine
The three major categories of photodetectors.
Explanation of Solution
Photodetectors:
Photodetectors are sensors widely used in today’s industries to sense the presence of objects without having the need to make physical contact with the object being sensed. The photodetectors operate at speeds that are much higher and cannot be tolerated by the mechanical contact switches.
Photodetectors can be categorized into three major types as follows:
- Photovoltaic.
- Photoemissive.
- Photoconductive.
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Chapter 20 Solutions
Understanding Motor Controls
Ch. 20 - List the three major categories of...Ch. 20 - In which category does the solar cell belong?
Ch. 20 - In which category do phototransistors and...Ch. 20 - Prob. 4RQCh. 20 - Prob. 5RQCh. 20 - Prob. 6RQCh. 20 - What is the advantage of a photodetector that uses...Ch. 20 - An object is to be detected by reflecting light...Ch. 20 - How much voltage is produced by a silicon solar...Ch. 20 - What determines the amount of current a solar cell...
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