Industrial Motor Control
7th Edition
ISBN: 9781133691808
Author: Stephen Herman
Publisher: Cengage Learning
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Textbook Question
Chapter 17, 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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3. The shaft below is made of steel (G = 80GPa). It has a diameter of 25mm and is fixed and
supported at the two ends of the shaft, A and D.
(i) Is this a statically indeterminate problem? Why?
(ii) Can you draw the torque load diagram without first resolving the reaction torques at A
or D?
(iii) Determine the reaction torque at A and D.
(iv) Draw the torque load diagram.
(v) Determine the angle of twist at section AB.
B
90 N·m
0.6 m
0.75 m
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4- A horizontal Venturi meter is used to measure the flow rate of water through the piping system
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Take Cd 0.98.
Chapter 17 Solutions
Industrial Motor Control
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