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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The unit of relative permeability is

Hennry/meter
Hennry
None of the listed here
Its dimensionless

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Magnetism and Electromagnetism
A rectangular magnet of magnetic moment M is cut into two piece of same length, the magnetic moment of each piece will be

2M
M
M/4
M/2

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Magnetism and Electromagnetism
Degaussing is the process of

Removal of magnetic impurities
Removing gases from the materials
Remagnetising metallic parts
Demagnetising metallic parts

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Magnetism and Electromagnetism
The magnetic materials exhibit the property of magnetisation because of

either of these
orbital motion of electrons
spin of electrons
spin of nucleus

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Magnetism and Electromagnetism
Paramagnetic materials have relative permeability

slightly more than unity
equal to that ferromagnetic mate rials
equal to unity
slightly less than unity

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Magnetism and Electromagnetism
For which of the following materials the net magnetic moment should be zero?

antiferromagnetic materials
antiferrimagnetic materials
ferrimagnetic materials
diamagnetic materials

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MORE MCQ ON Magnetism and Electromagnetism

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