Understanding Motor Controls
4th Edition
ISBN: 9781337798686
Author: Stephen L. Herman
Publisher: Delmar Cengage Learning
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Question
Chapter 47, Problem 2RQ
To determine
Whether output of LED will be AC or DC if input is AC.
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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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10. A diode under forward biasing acts like
(a) an open switch
(b) a closed switch
Chapter 47 Solutions
Understanding Motor Controls
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