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The coils of a superconducting magnet are usually made of niobium  in a copper matrix.

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Important Questions on Magnetism and Matter

MEDIUM
Physics>Electricity and Magnetism>Magnetism and Matter>Magnetic Properties of Materials
The susceptibility of a magnetic material is 0·9853. Identify the type of magnetic material. Draw the modification of the field pattern on keeping a piece of this material in a uniform magnetic field.
EASY
Physics>Electricity and Magnetism>Magnetism and Matter>Magnetic Properties of Materials
A soft ferromagnetic material is placed in an external magnetic field. The magnetic domains:
MEDIUM
Physics>Electricity and Magnetism>Magnetism and Matter>Magnetic Properties of Materials
Write three points of differences between para, dia, and ferromagnetic materials, giving one example for each.
EASY
Physics>Electricity and Magnetism>Magnetism and Matter>Magnetic Properties of Materials
Cobalt and Nickel are-
EASY
Physics>Electricity and Magnetism>Magnetism and Matter>Magnetic Properties of Materials
Which one of the following characteristics is not associated with a paramagnetic material?
EASY
Physics>Electricity and Magnetism>Magnetism and Matter>Magnetic Properties of Materials
Define diamagnetic and paramagnetic materials.
EASY
Physics>Electricity and Magnetism>Magnetism and Matter>Magnetic Properties of Materials
Classify the following materials with regard to magnetism: Manganese, cobalt, Nickel, Bismuth, Oxygen, Copper.
EASY
Physics>Electricity and Magnetism>Magnetism and Matter>Magnetic Properties of Materials
Distinguish between paramagnetic and diamagnetic materials in terms of i susceptibility and ii their behaviour in an external non-uniform magnetic field.
EASY
Physics>Electricity and Magnetism>Magnetism and Matter>Magnetic Properties of Materials

A perfectly diamagnetic sphere has a small spherical cavity at its centre, which is filled with a paramagnetic substance. The whole system is placed in a uniform magnetic field B→. Then the field inside the paramagnetic substance is:

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EASY
Physics>Electricity and Magnetism>Magnetism and Matter>Magnetic Properties of Materials
A paramagnetic sample shows a net magnetization of 8 Am-1 when placed in an external magnetic field of 0.6 T at a temperature of 4 K. When the same sample is placed in an external magnetic field of 0.2 T at a temperature of 16 K. The magnetization will be
MEDIUM
Physics>Electricity and Magnetism>Magnetism and Matter>Magnetic Properties of Materials
On the basis of atomic model of magnetism, differentiate among the paramagnetic, diamagnetic and ferromagnetic substances.
EASY
Physics>Electricity and Magnetism>Magnetism and Matter>Magnetic Properties of Materials
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
EASY
Physics>Electricity and Magnetism>Magnetism and Matter>Magnetic Properties of Materials
What are paramagnetic substances? How does its magnetic susceptibility vary with temperature?
EASY
Physics>Electricity and Magnetism>Magnetism and Matter>Magnetic Properties of Materials
The magnetic susceptibility of a substance is -1.66×10-5. Name the type of magnetic substance it represents.
EASY
Physics>Electricity and Magnetism>Magnetism and Matter>Magnetic Properties of Materials
What is diamagnetic substances?
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Physics>Electricity and Magnetism>Magnetism and Matter>Magnetic Properties of Materials
What a diamagnetic substance is brought near the north or south pole of a bar magnet, it is 
MEDIUM
Physics>Electricity and Magnetism>Magnetism and Matter>Magnetic Properties of Materials
What is the value of relative magnetic permeability of perfectly diamagnetic substance.
EASY
Physics>Electricity and Magnetism>Magnetism and Matter>Magnetic Properties of Materials
Needles N1,N2 and N3 are made of a ferromagnetic, a paramagnetic and a diamagnetic substance respectively. A magnet, when brought close to them, will
HARD
Physics>Electricity and Magnetism>Magnetism and Matter>Magnetic Properties of Materials
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:
MEDIUM
Physics>Electricity and Magnetism>Magnetism and Matter>Magnetic Properties of Materials

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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