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    I have a qn here on the faraday disc. An emf is induced across the rim and the axle and the magnitude of emf = BA/T. I read the book and was told to imagine the disc to be make of many many bicycle spokes. If you look at one spoke, as the disc rotates, the spoke is cutting across the magnetic field. My qn here is does the connection at the rim move with the spoke or the connection stays put and each time will touch a different spoke.

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    the connection stays put
 
 
 

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