1.

If X stands for the magnelic susceptibility of a substance. mu for its magnetic permeability and to mu_(0) the perincability of free space, then

Answer»

for a paramagnetic substance `X gt 0, MU gt 0`
for a paramagnetic substance : `X gt 0, mu gt mu_(0)`
for a diamagnetic substance `X LT 0,mult0`
Tora ferromagnelic substance. `X lt 1,multmu_(0)`

Solution :Magnetic susceptibility is GIVEN by,
`X = mu_(r) - 1`
and again we KNOW that `mu_(r) = mu/mu_(0)`
For paramagnetic substance, `X gt0`
`therefore mu_(r) gt 1 or mu gt mu_(0)`
For diamagnetic substance, `-1 le X le 0`
`therefore 0 le mu_(r) lt 1 or mu lt mu_(0)`
For ferromagnetic substance, `X gt gt 1`
`therefore mu gtgt mu_(0)`


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