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Figure 32-9(a) depicts a two-turn horizontal coil in a uniform downward B-field. Assume the field is increasing. (a) What is the direction of the induced magnetic field in the coil and why? (b) What is the direction of the induced current in the coil and why? (c) Which terminal is at a higher voltage? [Hint: Draw a diagram. Only concern yourself with what is happening inside the area of the coil.]
(a)
The direction of induced magnetic fieldin the two-turn horizontal coil when the magnetic field
Answer to Problem 15SP
Solution:
Upward to oppose the downward increase.
Explanation of Solution
Introduction:
Lenz’s law:
When magnetic flux is passing through a coil, an emf is induced in the coil due to change in magnetic flux linked with the coil. The direction of the induced emf is so as to oppose the change.
Explanation:
The magnetic field
Therefore, the direction of the induced magnetic field would be directed upward, as shown in figure (1).
In the figure (1), the symbol,
Conclusion:
The induced magnetic field
(b)
The direction of induced current in a two-turn horizontal coil when the magnetic field
Answer to Problem 15SP
Solution:
Counter clockwise direction.
Explanation of Solution
Introduction:
Lenz’s law:
When magnetic flux is passing through a coil, an emf is induced due to change in magnetic flux linked with the coil. The direction of induced emf is so as to oppose the change that produces it.
Explanation:
From part (a), the direction of induced magnetic field is upward, then the induced current
Conclusion:
The direction of induced current
(c)
The higher voltage terminal in two-turn horizontal coil when the magnetic field
Answer to Problem 15SP
Solution:
Explanation of Solution
Introduction:
The direction of current is always from negative terminal to the positive, inside the emf source, and positive terminal to the negative, outside the emf source.
Explanation:
The direction of induced magnetic field is upward, then the induced current
Conclusion:
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Chapter 32 Solutions
Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
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