Q16 of 44 Page 202

Answer the following question:

Is the permeability of a ferromagnetic material independent of the magnetic field? If not, is it more for lower or higher fields?

The permeability of ferromagnetic materials is inversely dependent on the applied magnetic field, i.e. it is lower for a higher field and vice versa.


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16

Answer the following question:

Why is diamagnetism, in contrast, almost independent of temperature?

 16

Answer the following question:

If a toroid uses bismuth for its core, will the field in the core be (slightly) greater or (slightly) less than when the core is empty?

 16

Answer the following question:

Magnetic field lines are always nearly normal to the surface of a ferromagnet at every point. (This fact is analogous to the static electric field lines being normal to the surface of a conductor at every point.) Why?

 16

Answer the following question:

Would the maximum possible magnetization of a paramagnetic sample be of the same order of magnitude as the magnetization of a ferromagnet?