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Magnetism and Electromagnetism

Magnetism and Electromagnetism
Which of the following is expected to have the maximum permeability ?

Copper
Zinc
Brass
Ebolite

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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

M/2
M
2M
M/4

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Magnetism and Electromagnetism
If the cross-sectional area of a magnetic field increases, but the flux remains the same, the flux density

decreases
increases
doubles
remains the same

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Magnetism and Electromagnetism
Paramagnetic materials have relative permeability

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

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Magnetism and Electromagnetism
A keeper is used to

Restore lost flux
Change the direction of magnetic lines
Amplify flux
Provide a closed path for flux

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Magnetism and Electromagnetism
The stray line of magnetic flux is defined as

A line of magnetic flux in a non-uniform field
The mean length of a ring shaped coil
A line vertical to the flux lines
A line of magnetic flux which does not follow the designed path

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MORE MCQ ON Magnetism and Electromagnetism

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