Are these instances of identical magnetic fields?

AI Thread Summary
The discussion centers on whether the magnetic fields from an electromagnet powered by a capacitor discharge and a rotating permanent magnet are instances of time-varying fields. It is noted that the permanent magnet, when attached to a rotating disc, can induce eddy currents depending on its rotation. The conversation raises questions about the nature of the rotating permanent magnet, specifically how it can be considered both rotating and static simultaneously. Overall, the interaction between these magnetic fields and their effects on nearby targets is a key focus. Understanding these dynamics is crucial for applications involving electromagnetic induction.
pager48
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Are both magnetic fields emanated from an electromagnet fed with a current spike from a charge capacitor and a rotating static magnetic field from permanent magnets instances of time varying fields?

The permanent magnet would be attached to perhaps some rotating disc thus passing over a target were as an electromagnet can stay over the target and is a magnet only when the capacitor discharges thru it. Does the rotating permanent magnet induce eddy currents?
 
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How can it be rotating and static at the same time?
pager48 said:
Does the rotating permanent magnet induce eddy currents?
It depends on how it rotates, in general yes.
 
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