Force between two superconducting wires

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Discussion Overview

The discussion centers on the interaction between two parallel superconducting wires carrying the same current in the same direction, specifically exploring whether they experience a magnetic force attracting them together and how their magnetic fields behave in this context.

Discussion Character

  • Debate/contested
  • Technical explanation

Main Points Raised

  • Some participants inquire whether the magnetic force between the wires is attractive due to their currents and how their magnetic fields interact.
  • One participant references Ampère's force law to seek clarification on its applicability to superconductors.
  • Another participant raises the point that superconductors expel magnetic fields, questioning if this affects the force experienced by the wires.
  • A participant asserts the relevance of Newton's third law in this context, implying that forces must have equal and opposite reactions.
  • There is a suggestion to consider the Lorentz force as a related concept in understanding the forces at play.

Areas of Agreement / Disagreement

Participants express uncertainty regarding the application of classical laws, such as Ampère's force law, to superconductors, indicating that multiple competing views remain on the topic.

Contextual Notes

Participants have not fully resolved the implications of superconductors expelling magnetic fields and how this interacts with the forces described by classical physics. There are also references to foundational concepts that may require further exploration.

Danyon
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Consider two parallel superconducting wires. Both the wires carry the same current and the current is going in the same direction. do they experience a magnetic force attracting them together? Or do their magnetic fields behave differently?
 
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There is no escaping Newton's third law.
 
So does amperes force law apply to superconductors?
 
At the foot of this page ⇣⇣⇣ you'll see an earlier article on Lorentz force.
 

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