One answer to the ‘Question on electromagnetic inductance’

Since it is impossible to supply infinite amount of energy to magnetize an electromagnetic coil, therefore the answer for the A Question on electromagnetic inductance is that the surround ferromagnetic material would decrease the electrical energy it required to magnetize the electromagnetic coil as long as those material are not contained by the coil. In a sense, the ferromagnetic material would supply magnetic energy it required to magnetize a coil. Where does those energy come from?

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~ 由 newnewhkcc1976 於 五月 31, 2008.

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