Concept explainers
(a)
The current in the metal rod.
(a)
Answer to Problem 3P
The current in the metal rod is
Explanation of Solution
Figure
Write the expression for the induced emf in the metal rod.
Here,
Write the expression for the current in the metal rod.
Here,
Use equation (II) in (I) to solve for
Conclusion:
Substitute
Therefore, the current in the metal rod is
(b)
The energy dissipated in the resistor.
(b)
Answer to Problem 3P
The rate of energy dissipated in the resistor is
Explanation of Solution
Write the expression for the energy dissipated in the resistor.
Here,
Conclusion:
Substitute
Therefore, the energy dissipated in the resistor is
(c)
The magnetic force on the metal rod.
(c)
Answer to Problem 3P
The magnetic force on the metal rod is
Explanation of Solution
Write the expression for the magnetic force.
Here,
Conclusion:
Substitute
Therefore, the magnetic force on the metal rod is
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Chapter 20 Solutions
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