Assume that an LED is tobepowered bya 12VDC. Toensure a current draw of 20mA a current-limiting resistor is used in series with the LED. Specify the electrical properties of the current- limiting resistor to be used in this application (in other words, determine the resistor value and its power rating). The LED used has a voltage drop of 1.9 volts.

Assume that an LED is tobepowered bya 12VDC. Toensure a current draw of 20mA a current-limiting resistor is used in series with the LED. Specify the electrical properties of the current- limiting resistor to be used in this application (in other words, determine the resistor value and its power rating). The LED used has a voltage drop of 1.9 volts.

EBK ELECTRICAL WIRING RESIDENTIAL

19th Edition

ISBN:9781337516549

Author:Simmons

Publisher:Simmons

Chapter19: Special-purpose Outlets-water Pump, Water Heater

Section19.2: Water Heater Branch Circuit

Problem 17R: a. If both elements of the water heater in this residence are energized at the same time, how much...

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