How is current induced in superconductors?

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SUMMARY

The discussion focuses on the induction of current in superconductors, specifically addressing the role of resistance and inductance. It is established that while superconductors exhibit zero resistance, they possess significant inductance, which influences the current flow according to the equation v = L (di/dt). The conversation clarifies that initially, current flows through a resistive segment, but as the inductance takes effect, the current gradually shifts to the superconducting loop, ultimately leading to a permanent current once the resistive segment is cooled and becomes superconducting.

PREREQUISITES
  • Understanding of superconductivity and its properties
  • Familiarity with inductance and its mathematical representation (v = L (di/dt))
  • Knowledge of RL circuits and their behavior
  • Basic principles of electrical resistance and current flow
NEXT STEPS
  • Study the principles of superconductivity and its applications in superconducting magnets
  • Learn about inductance and how it affects current in electrical circuits
  • Explore RL circuits and their transient response characteristics
  • Investigate the role of resistance in circuits with varying inductance
USEFUL FOR

Electrical engineers, physicists, and students interested in superconductivity, electromagnetism, and circuit design will benefit from this discussion.

  • #31
I understand that the source of the heater is the resistance R, that being said, what governs the level of resistance and when it is changed what affect does
this have on the superconductor. Can Kevin explain. And if the R can be modulated through or by another means making it a variable, what does this do
to the equation?
 
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  • #32
Kenneth L Bridges said:
I understand that the source of the heater is the resistance R
The source of the heat is not the resistance R. The heat is supplied by a completely separate circuit that does not interact electrically with the superconductor
 
  • #33
I enjoyed reading the discussion and I am glad to say that I now understand the whole process of setting up a large current in a superconducting coil.
 
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