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Important Questions on Magnetism and Matter

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Physics>Electricity and Magnetism>Magnetism and Matter>Magnetization and Magnetic Intensity
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 
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Physics>Electricity and Magnetism>Magnetism and Matter>Magnetization and Magnetic Intensity
Write three points of differences between para, dia, and ferromagnetic materials, giving one example for each.
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Physics>Electricity and Magnetism>Magnetism and Matter>Magnetization and Magnetic Intensity

The B-H curve for a ferromagnet is shown in the figure. The ferromagnet is placed inside a long solenoid with 1000 turns cm-1. The current that should be passed in the solenoid to demagnetize the ferromagnet completely is, 
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Physics>Electricity and Magnetism>Magnetism and Matter>Magnetization and Magnetic Intensity
Magnetic susceptibility for a paramagnetic and diamagnetic material is respectively
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Physics>Electricity and Magnetism>Magnetism and Matter>Magnetization and Magnetic Intensity
The magnetic susceptibility is negative for:
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Physics>Electricity and Magnetism>Magnetism and Matter>Magnetization and Magnetic Intensity
What is the magnetic moment associated with a solenoid?
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Physics>Electricity and Magnetism>Magnetism and Matter>Magnetization and Magnetic Intensity
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.
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Physics>Electricity and Magnetism>Magnetism and Matter>Magnetization and Magnetic Intensity
A long solenoid has 1000 turns. When a current of 4 A flows through it the magnetic flux linked with each turn of the solenoid is 4×10-3 Wb. The self-inductance of the solenoid is:
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Physics>Electricity and Magnetism>Magnetism and Matter>Magnetization and Magnetic Intensity
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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Physics>Electricity and Magnetism>Magnetism and Matter>Magnetization and Magnetic Intensity
In a superconductor, critical magnetic field
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Physics>Electricity and Magnetism>Magnetism and Matter>Magnetization and Magnetic Intensity
A charged particle moves through a magnetic field perpendicular to its direction. Then
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Physics>Electricity and Magnetism>Magnetism and Matter>Magnetization and Magnetic Intensity
Name the source plant of heroin drug. How is it obtained from the plant?
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Physics>Electricity and Magnetism>Magnetism and Matter>Magnetization and Magnetic Intensity

What is the importance of Oersted's experiment?

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Physics>Electricity and Magnetism>Magnetism and Matter>Magnetization and Magnetic Intensity
What is magnetic susceptibility?
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Physics>Electricity and Magnetism>Magnetism and Matter>Magnetization and Magnetic Intensity
What is the unit of magnetic field intensity?
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Physics>Electricity and Magnetism>Magnetism and Matter>Magnetization and Magnetic Intensity
How does the self-inductance of a coil depend on the number of turns of the coil?
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Physics>Electricity and Magnetism>Magnetism and Matter>Magnetization and Magnetic Intensity
The total number of turns and cross-section area in a solenoid is fixed. However, its length L is varied by adjusting the separation between windings. The inductance of solenoid will be proportional to:
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Physics>Electricity and Magnetism>Magnetism and Matter>Magnetization and Magnetic Intensity
Classify the following materials with regard to magnetism: Manganese, cobalt, Nickel, Bismuth, Oxygen, Copper.
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Physics>Electricity and Magnetism>Magnetism and Matter>Magnetization and Magnetic Intensity
Write the effects of heroin on the human body.
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Physics>Electricity and Magnetism>Magnetism and Matter>Magnetization and Magnetic Intensity
Drug called 'Heroin' is synthesized by: