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If we take a rod and wrap it with a coil with N turns and then wrap another secondary coil on top of the primary with same N turns, the core has open ends, will this type of transformer act as an electromagnet as well? If yes, will the magnetic strength match the magnetic strength of a solenoid conventional electromagnet of same turns, voltage and current?

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    $\begingroup$ Not going to "answer" because I'm not 100% sure, but I think it depends on how much current flows in the secondary. If the secondary is open, (i.e., no secondary current) then there is no difference beteween your transformer and a solenoid that has the same number of turns as your transformer's primary. But if you allow current to flow in the secondary, I'm guessing that will diminish the magnetic flux in the core. $\endgroup$ – Solomon Slow Mar 28 at 1:56

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