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Concept explainers
(a)
The sketch showing the various vectors involved.
(a)
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Explanation of Solution
The sketch showing the various vectors involved is shown in the figure below.
Figure-(1)
Here,
(b)
The vector force by lightening stoke on the electron.
(b)
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Answer to Problem 16P
The vector force by lightening stoke on the electron is
Explanation of Solution
Write the expression to obtain the magnetic field along the conductor.
Here,
Write the expression to obtain the vector force on the electron.
Here,
Conclusion:
Substitute
The magnetic field in vector form.
Substitute
Therefore, the vector force by lightening stoke on the electron is
(c)
The radius of the electron’s path.
(c)
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Answer to Problem 16P
The radius of the electron’s path is
Explanation of Solution
Write the expression to obtain the radius of the electron’s path.
Here,
Conclusion:
Substitute
Therefore, the radius of the electron’s path is
(d)
Weather it is good approximation to model the electron is moving in the uniform magnetic field.
(d)
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Explanation of Solution
It is not good approximation to model the electron is moving in the uniform magnetic field because the magnitude of the magnetic field is not same through-out that is the magnetic field varies with the distance from the lightening stoke.
(e)
The number of revolutions the electron will complete during
(e)
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Answer to Problem 16P
The number of revolutions the electron will complete during
Explanation of Solution
Write the expression to obtain the number of revolutions the electron will complete during
Here,
Write the expression to obtain the time to complete one revolution.
Here
Conclusion:
Substitute
Substitute
Therefore, the number of revolutions the electron will complete during
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Chapter 30 Solutions
Physics for Scientists and Engineers with Modern Physics, Technology Update
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