Concept explainers
(a)
The magnitude and direction of the electric field in the wire.
(a)
Answer to Problem 47PQ
The magnitude and direction of the electric field in the wire are
Explanation of Solution
Write the relation for the electric field in the wire.
Here,
Conclusion:
Substitute
Therefore, the magnitude and direction of the electric field in the wire are
(b)
The resistance of the wire.
(b)
Answer to Problem 47PQ
The resistance of the wire is
Explanation of Solution
Write the relation for the resistance of the cylindrical silver wire.
Here,
Conclusion:
Substitute
The resistance of the cylindrical silver wire is
(c)
The magnitude and direction of the current in the wire.
(c)
Answer to Problem 47PQ
The magnitude and direction of the current in the wire are
Explanation of Solution
Write the relation for the current in the cylindrical silver wire.
Here,
Conclusion:
Substitute
The current is in positive sign represents that it flows from left to right.
The magnitude and direction of the current in the wire are
(d)
The current density in the wire.
(d)
Answer to Problem 47PQ
The current density in the wire is
Explanation of Solution
Write the relation for the current density in the wire.
Here,
Conclusion:
Substitute
Therefore, the current density in the wire is
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Chapter 28 Solutions
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