Can a Cavity Magnetron Be Used in Reverse to Generate Resonant Frequencies?

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A cavity magnetron may theoretically be used in reverse to generate resonant frequencies by allowing electromagnetic waves to interact with a magnetic field, potentially energizing electrons to move from a cathode to an anode. Concerns are raised about placing metal objects in microwave ovens, as they can reflect radiation back into the magnetron, possibly causing resonance that could damage the device. The interaction between electromagnetic waves and the magnetic field is questioned, with suggestions that these waves influence electrons within the field. Understanding these interactions is crucial for both microwave safety and the potential applications of magnetrons. The discussion highlights the complexities of electromagnetic theory and practical implications in microwave technology.
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Could a cavity magnetron be done in reverse in a way so that the em waves would interact with the magnetic field and give electrons energy to jump from a cathode to an anode and would any resonant frequencies be involved?

I've read some where that this is why metal articles should not be put into microwave ovens they can reflect the radiation back into the magnetron and if the placement is right the resonance can cause the jumping electrons to fry it. Is this correct?
 
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Why would the EM waves interact with the B field?
 
I think they act on the electrons in the b field
 
Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'

Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'

So here is the motional EMF formula. Now I understand the standard Faraday paradox that an axis symmetric field source (like a speaker motor ring magnet) has a magnetic field that is frame invariant under rotation around axis of symmetry. The field is static whether you rotate the magnet or not. So far so good. What puzzles me is this , there is a term average magnetic flux or "azimuthal mean" , this term describes the average magnetic field through the area swept by the rotating Faraday...
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