2K blue IK R R Sr wr

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
10th Edition
ISBN:9781337399128
Author:Russell E. Smith
Publisher:Russell E. Smith
Chapter2: Basic Electricity
Section: Chapter Questions
Problem 25RQ: Which of the following is the best insulator? a. wood b. thermoplastic c. copper d. cast iron
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Question

R = 10k, S1 is now closed, what is VR, the voltage across R, in volts?

hfe = beta = 100. Assume Vbe = .6V when the transistor is on, and the blue LED has Vf=2V.

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Transcribed Image Text:2K blue IK R R Sr wr
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