Materials can be classified based on their magnetic properties. Key categories include diamagnetic, paramagnetic, and ferromagnetic.
Ferromagnetic materials are strongly attracted to magnets and can be magnetized themselves. They maintain their magnetism even after the external magnetic field is removed.
Nickel is known to exhibit strong magnetic characteristics. It is readily attracted to magnets and can be magnetized, fitting the definition of a ferromagnetic substance.
Therefore, Nickel is classified as a ferromagnetic material.
Diamagnetic materials, in contrast, are only weakly repelled by magnetic fields.
The substances which are attracted by the magnetic field are
The dimension of ferromagnetic domains is in the order of
Of the following, the most suitable for making permanent magnet is:
The magnetic fields at a distance 'd' from a short bar magnet in longitudinal and transverse positions are in the ratio:
Magnets lose their magnetic properties, when