What would be the energy of the magnetic field of the coil of the previous problem, if its core were of a nonferromagnetic material? What is the source of oxcess energy in the case of a ferromagnetic core?

What would be the energy of the magnetic field of the coil of the prev

1.	What would be the energy of the magnetic field of the coil of the previous problem, if its core were of a nonferromagnetic material? What is the source of oxcess energy in the case of a ferromagnetic core?
Answer» Solution :"The energy of the MAGNETIC field in the ABSENCE of the ferromagnetic core is `W_(m) 1//2mu_(0) H^2V` It is significantly less than the energy of the magnetic field in the presence of a forromagnetic core, DESPITE the fact that the current Mowing through the winding is the same in both cases. The explanation is that in the absence of a ferromagnetic core the current in the coil atlnins ils stationary VALUE very quickly and the work performed by the power SUPPLY in inducing the magnetic field is much less than in the presence of such a core.

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What would be the energy of the magnetic field of the coil of the previous problem, if its core were of a nonferromagnetic material? What is the source of oxcess energy in the case of a ferromagnetic core?

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