Flux Linking with Aluminium Disk Above a Vertical Current Carrying Rod: AC vs DC

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An aluminum disk placed above a completely vertical current-carrying iron rod will not experience any magnetic flux linkage under ideal conditions. The current in the rod generates a circular magnetic field around it, which does not extend vertically to link with the disk. The distinction between AC and DC current is significant because AC generates a time-varying magnetic field, potentially inducing an electromotive force (EMF) in the disk, while DC produces a static field that does not induce EMF. The discussion also clarified that the original question was more of a thought experiment than a traditional homework problem. Understanding these principles is crucial for analyzing electromagnetic interactions in various configurations.
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Homework Statement



If an aluminium disk is placed above a COMPLETELY vertical current carrying iron rod will any flux link with the aluminium disk ASSUMING ideal situations

Homework Equations


The Attempt at a Solution


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I think not because the current carrying rod produces a circular field around itself (right hand corkscrew rule) but am not sure...can someone please confirm this :)

also, why is it important if the current is AC or DC?
 
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