Concept explainers
Part (a) To determine:
Answer to Problem 20Q
Solution:
The direction of current in the lower wire.
Explanation of Solution
The direction of current in the lower wire is opposite to the direction of current in the upper wire.
Consider a current carrying conductor which is fixed. This generates a magnetic field in the space surrounding to it. When we move another current carrying conductor (which also generates a magnetic field)over a fixed conductor, it try to align in stable equilibrium. This is possible only if the magnetic field due to them are opposite to each other. Hence the current in the two conductors are opposite to each other.
(b) To determine:
Answer to Problem 20Q
Solution:
Whether the lower wire can be held in stable equilibrium due to the magnetic force of the upper wire.
Explanation of Solution
No. The lower wire cannot be held in stable equilibrium due to the magnetic force of the upper wire.
No. The lower wire cannot be held in stable equilibrium due to the magnetic force of the upper wire. This is because forces on each conductor is distance dependent. As force changes, acceleration also changes. Hence unstable.
Conclusion:
No. The lower wire cannot be held in stable equilibrium due to the magnetic force of the upper wire.
Chapter 20 Solutions
Physics: Principles with Applications
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