Understanding Motor Controls
4th Edition
ISBN: 9781337798686
Author: Stephen L. Herman
Publisher: Delmar Cengage Learning
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Chapter 47, Problem 3RQ
What is the average forward voltage drop of LED?
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An LED is to be connected into a 40-volt DC circuit. If the LED has a maximum current flow of 20 mA, what size resistor should be used to limit the current flow through the LED?
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Understanding Motor Controls
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