Concept explainers
The current carried by the wire.
To identify: Whether it is feasible or not.
Answer to Problem 8P
The current in the wire is 1400 A which is not feasible.
Explanation of Solution
Given:
The diameter of the copper wire is 1mm floating due to the Earth’s magnetic field
Formula used:
The magnetic force is calculated as
Calculation:
The magnetic force applied in the wire must be equal in magnitude with the gravitational force applied to it. Since the wire is perpendicular to the Earth’s magnetic field thus angle of inclination would be
Thus, the current in the copper wire is
The current in the copper wire is way too high. Before reaching this magnitude of current, Joule heating in the thin copper wire would probably melt it. Thus, this answer is not feasible.
Conclusion:
Therefore, the current in wire is 1400 A and the answer is not feasible.
Chapter 20 Solutions
Physics: Principles with Applications
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