Electrical Transformers and Rotating Machines
4th Edition
ISBN: 9781305494817
Author: Stephen L. Herman
Publisher: Cengage Learning
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Question
Chapter 3, Problem 6RQ
To determine
The total inductance of the circuit.
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6. Referring to Figure 5, given that the peak current Ip = 5 mA.
i. Briefly explain the terms: angular velocity, frequency, and period.
ii. Write the mathematical expression for the sine wave below that represent the ac
current.
i. Find the effective value, Ims
iv. Calculate the frequency, f and the period, T
v. Determine the instantaneous current at t, = 25 µs, t2 = 60 µs, t3 = 120 us
i(t)
150
350
t (us)
50
250
Figure 5
Q5/ Determine the Nodal Voltage for the figure
13
V₁
R3
ww
20
z
4A
www
12
Ry 202
R₂602
ZA
A balanced positive-sequence wye-connected
60-Hz three-phase source has line-to-line
voltages of VL = 440 V rms. This source is
connected to a balanced wye-connected load.
Each phase of the load consists of a 0.5-H
inductance in series with a 50-? resistance.
Assume that the phase of Van is zero.
A) Find the line-to-neutral voltage phasor
Van.
Enter your answer using polar notation.
Express argument in degrees.
B) Find the line-to-neutral voltage phasor
Vbn.
Enter your answer using polar notation.
Express argument in degrees.
C) Find the line-to-neutral voltage phasor
Vcn.
Enter your answer using polar notation.
Express argument in degrees.
D) Find the line-to-line voltage phasor Vab.
Enter your answer using polar notation.
Express argument in degrees.
Chapter 3 Solutions
Electrical Transformers and Rotating Machines
Ch. 3 - How many degrees are the current and voltage out...Ch. 3 - How many degrees are the current and voltage out...Ch. 3 - To what is inductive reactance proportional?Ch. 3 - Four inductors, each having an inductance of 0.6...Ch. 3 - Three inductors are connected in parallel....Ch. 3 - Prob. 6RQCh. 3 - An inductor is connected to a 240-V, 1000-Hz line....Ch. 3 - Prob. 8RQCh. 3 - Prob. 9RQCh. 3 - An inductor has an inductive reactance of 250 Ω...
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