Electric current passing through closed loop

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SUMMARY

An electric current passing through a closed loop can only be defined under stationary conditions due to the necessity of considering displacement current and time-varying electric fields when the current is not stationary. In circuits containing capacitors and inductors, the current is transient until it stabilizes, while in purely resistive circuits, the transient period is minimal. Understanding these dynamics is crucial for accurate analysis of electric circuits.

PREREQUISITES
  • Understanding of electric current and closed loop circuits
  • Familiarity with displacement current concepts
  • Knowledge of time-varying electric fields
  • Basic principles of capacitors and inductors in circuits
NEXT STEPS
  • Study Maxwell's equations to understand displacement current
  • Learn about transient analysis in RLC circuits
  • Research the behavior of electric fields in dynamic conditions
  • Explore the differences between AC and DC circuit analysis
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Students studying electrical engineering, educators teaching circuit theory, and professionals involved in circuit design and analysis.

Frank-95
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Homework Statement



(sorry for possible notation errors, that might arise during the translation)

Why an electric current passing through a closed loop, can be defined only in stationary conditions?

Homework Equations



The Attempt at a Solution



I think that the reason is that, if the current is not stationary we must consider also displacement current and the tyme varying electric field, but the question is really generic so I have my doubts.

Can you help me? Many thanks!
 
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In case of closed loop containing capacitors and/or inductors, the current depends on the time after closing the circuit, till the transient current is ceased. In case of resistors only in the circuit, the transient is for a very-very short time, and we can not determine it without knowing more details, as you wrote in your post.
 
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