Industrial Motor Control
7th Edition
ISBN: 9781133691808
Author: Stephen Herman
Publisher: Cengage Learning
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Question
Chapter 59, Problem 5RQ
To determine
The minimum size resistor that must be connected in series with the LED when the LED is connected to the 24 V source and the maximum current is of 20 mA.
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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?
is used to convert resistance
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A transistor has a DC Beta of 250 and a base current, IB, of 20 microA. The
collector current, IC, equals *
5 microamperes
500 microamperes
5 milliamperes
50 milliamperes
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