Electric current passing through closed loop

AI Thread Summary
An electric current in a closed loop can only be defined under stationary conditions because non-stationary currents involve displacement current and time-varying electric fields. In circuits with capacitors and inductors, the current behavior changes over time until transient effects cease. For circuits containing only resistors, the transient period is very brief, making it difficult to analyze without additional information. Understanding these dynamics is crucial for accurately describing current flow in various circuit configurations. The discussion emphasizes the importance of stationary conditions for clear definitions of electric current.
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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