Electrical Transformers and Rotating Machines
4th Edition
ISBN: 9781305494817
Author: Stephen L. Herman
Publisher: Cengage Learning
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Chapter 8, Problem 9RQ
To determine
The secondary line current.
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1. Four masses A, B, C and D are attached to a shaft and revolve in the same plane. The masses are 12
kg. 10 kg. 18 kg and 15 kg respectively and their radii of rotations are 40 mm, 50 mm, 60 mm and
30 mm. The angular position of the masses B, C and D are 60°, 135° and 270 from the mass A.
Find the magnitude and position of the balancing mass at a radius of 100 mm.
[Ans. 7.56 kg: 87 clockwise from A]
3. The structure in Figure 3 is loaded by a horizontal force P = 2.4 kN at C. The roller at E is
frictionless. Find the axial force N, the shear force V and the bending moment M at a section
just above the pin B in the member ABC and illustrate their directions on a sketch of the segment
AB.
B
P
D
A
65°
65°
E
all dimensions in meters
Figure 3
4. The distributed load in Figure 4 varies linearly from 3wo per unit length at A to wo per unit
length at B and the beam is built in at A. Find expressions for the shear force V and the bending
moment M as functions of x.
3W0
Wo
A
L
Figure 4
2
B
Chapter 8 Solutions
Electrical Transformers and Rotating Machines
Ch. 8 - How many transformers are needed to make an...Ch. 8 - Two transformers rated at 100 kVA each are...Ch. 8 - Prob. 3RQCh. 8 - Assume that a line voltage of 2400 volts is...Ch. 8 - Prob. 5RQCh. 8 - How much current is flowing through the secondary...Ch. 8 - How much current is flowing through the primary...Ch. 8 - Prob. 8RQCh. 8 - Prob. 9RQCh. 8 - How much current is flowing in the secondary...
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