EASY
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The susceptibility of a ferromagnetic substance is

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Important Questions on Magnetic Effects of Current and Magnetism

MEDIUM
The susceptibility of magnetism at 300 K is 1.2×10-15. What will be its susceptibility at 200 K?
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A paramagnetic material has 1028 atoms m-3. Its magnetic susceptibility at temperature 350 K is 2.8×10-4. Its susceptibility at 300 K is
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A 25 cm long solenoid has the radius 2 cm and 500 turns. It carries a current of 15 A. If it is equivalent to a magnet of the same size and magnetization M Magnetic momentvolume,then  M is:
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Magnetic susceptibility for a paramagnetic and diamagnetic material is respectively
MEDIUM

Consider the regular array of vertical identical current-carrying wires (with the direction of current flow as indicated in the figure below) protruding through a horizontal table. If we scatter some diamagnetic particles on the table, they are likely to accumulate-

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MEDIUM
Above the curie temperature the susceptibility of a ferromagnetic substance varies
MEDIUM

If μo and εo are respectively the permeability and permittivity of free space, μ and ε are the corresponding quantities in a medium, then the refractive index of the medium with respect to free space is:

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If Mz= magnetization of a paramagnetic sample, B= external magnetic field, T= absolute temperature, C= curie constant then according to Curie's law in magnetism, the correct relation is
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The coercivity of a small magnet, where the ferromagnet gets demagnetised is 3×103 A/m. The current required to be passed in a solenoid of length 10 cm and number of turns 100, so that the magnet gets demagnetised when inside the solenoid is
HARD
Nickel (Z=28) combines with a uninegative monodentate ligand to form a diamagnetic complex NiL 4 2 . The hybridisation involved and the number of unpaired electrons present in the complex are respectively:
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An example of a perfect diamagnet is a superconductor. This implies that when a superconductor is put in a magnetic field of intensity B, the magnetic field Bs inside the superconductor will be such that
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The magnetic susceptibility of a paramagnetic substance at -173 °C is 1.5×10-2. To have the susceptibility 0.5×10-2, the change in temperature in °C is
MEDIUM
An iron rod of susceptibility 599 is subjected to a magnetising field of 1200 A m1. The permeability of the material of the rod is:
μ0=4π×107 T m A1
MEDIUM
A domain in ferromagnetic iron in the form of cube is having 5×105 atoms. If the side length of this domain is 1.5 μm and each atom has a dipole moment of 8×10-24 A m2, then magnetisation of domain is