Ammeter internal model 25 Q Rs R2 R4 ww Ammeter R3: Vs R3
Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
10th Edition
ISBN:9781337399128
Author:Russell E. Smith
Publisher:Russell E. Smith
Chapter12: Electronic Control Devices
Section: Chapter Questions
Problem 4RQ: What is the difference between a diode and rectifier?
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Question
An ammeter is used as shown in Figure P2.78. The
ammeter model consists of an ideal ammeter in series
with a resistance. The ammeter model is placed in the
branch as shown in the figure. Find the current through
R5 both with and without the ammeter in the circuit for the following values, assuming that RS = 20 ,
R1 = 800 , R2 = 600 , R3 = 1.2 k, R4 = 150 ,
and VS = 24 V.
a. R5 = 1 k
b. R5 = 100
c. R5 = 10
d. R5 = 1
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