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Answer the following questions:(a) Why does a paramagnetic sample display greater magnetisation(for the same magnetising field) when cooled? (b) Why is diamagnetism, in contrast, almost independent oftemperature? (c) 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? (d) Is the permeability of a ferromagnetic material independent ofthe magnetic field? If not, is it more for lower or higher fields? (e) Magnetic field lines are always nearly normal to the surface of aferromagnet at every point. (This fact is analogous to the staticelectric field lines being normal to the surface of a conductor atevery point.) Why? (f ) Would the maximum possible magnetisation of a paramagneticsample be of the same order of magnitude as the magnetisationof a ferromagnet? |
| Answer» Answer the following questions:(a) Why does a paramagnetic sample display greater magnetisation(for the same magnetising field) when cooled? (b) Why is diamagnetism, in contrast, almost independent oftemperature? (c) 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? (d) Is the permeability of a ferromagnetic material independent ofthe magnetic field? If not, is it more for lower or higher fields? (e) Magnetic field lines are always nearly normal to the surface of aferromagnet at every point. (This fact is analogous to the staticelectric field lines being normal to the surface of a conductor atevery point.) Why? (f ) Would the maximum possible magnetisation of a paramagneticsample be of the same order of magnitude as the magnetisationof a ferromagnet? | |