Electrical Transformers and Rotating Machines
4th Edition
ISBN: 9781305494817
Author: Stephen L. Herman
Publisher: Cengage Learning
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Textbook Question
Chapter 1, Problem 1RQ
Is the north magnetic pole of the earth a north polarity or a south polarity?
Expert Solution & Answer
To determine
Whether the north magnetic pole of earth is of north polarity or south polarity.
Explanation of Solution
The phenomenon of interchanging of the magnetic north pole and magnetic south pole is termed as geomagnetic reversal. These reversal occurrences are statically random in nature. The Earth is surrounded entirely by magnetic lines of forces. It can also be said that it is surrounded by a magnetic shell. Due of the fact, that unlike magnetic poles attract each other, the south magnetic pole of the Earth attracts the north magnetic pole of the compass needle.
Thus, the north magnetic pole of earth is actually of south polarity.
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Question 1.
A tube rotates in the horizontal xy plane with a constant angular velocity w about the z-axis. A
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This problem is based on problem 3.2 in the text.
y
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m
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Figure 1
X
a) Draw a free body diagram of the particle if the tube is frictionless.
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solve for the radius of the particle as a function of time. I'm only looking for the differential
equation. DO NOT solve it.
e) If there is no friction, what is the angle of the tube when the particle exits?
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Chapter 1 Solutions
Electrical Transformers and Rotating Machines
Ch. 1 - Is the north magnetic pole of the earth a north...Ch. 1 - What were early natural magnets known as?
Ch. 1 - The south pole of one magnet is brought close to...Ch. 1 - How can the polarity of an electromagnet be...Ch. 1 - Define the following terms:
Flux...Ch. 1 - A force of 1 ounce is equal to how many dynes?
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