PARAMAGNETIC SUBSTANCES

REASON OF PARAMAGNETIC, DIAMAGNETIC AND FERROMAGNETIC SUBSTANCES

STATEMENT-1 : Above Curie temperature substance is converted to paramagnetic substance. and STATEMENT-2 : As the Curie temperature is reached , the energy associated with thermal motion becomes large enough compared to the interaction energy responsible for the spontaneous alignment of magnetic moments .

Which of the following substances are paramagnetic? Al, Bi, Cu, Ca, Pb, Ni.

Assertion: The ferromagnetic substance do not obey Curie's law. Reason: At Curie point a ferromagnetic substance start behaving as a paramagnetic subsrance.

Assertion : The product of magnetic susceptibility and absolute temperature for a paramagnetic substance is constant. Reason: Susceptibility is positive but very small for paramagnetic substance.

A: Above curie-point a ferromagnetic substance behaves as a paramagnetic substance. R: Magnetic susceptibility of a diamagnetic substance increases with rise in temperature.

Out of given paramagnetic substance (Calcium, Chromium, Oxygen and Tungsten) which substance has maximum susceptibility

The magenetic susceptility of paramagnetic substance is 3 xx 10^(-4) . It is placed in magnetising field of 4 xx 10^(4) A//m . The intensity of magnetisation will be

A perfectily diamagnetic sphere has a small spherical cavity at its centre, which is filled with a paramagentic substance. The whole system is places in a uniform magnetic field vecB Then the field inside the paramagnetic substance is