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Magnetism and Electromagnetism

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/2
M/4

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Magnetism and Electromagnetism
Strength of an electromagnet can be increased by

Increasing current supply
Increasing the number of turns
All of the listed here
Increasing the cross-sectional area

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Magnetism and Electromagnetism
Magnetising steel is normals difficult because

it corrodes easily
it has low permeability
it has high permeability
it has high specific gravity

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Magnetism and Electromagnetism
The ratio of intensity of magnetisation to the magnetisation force is known as

Susceptibility
Relatice permeability
None of the listed here
Flux density

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Magnetism and Electromagnetism
Degaussing is the process of

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

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

A line of magnetic flux which does not follow the designed path
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

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MORE MCQ ON Magnetism and Electromagnetism

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