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Magnetism and Electromagnetism

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

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

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Magnetism and Electromagnetism
What is the magneto-motive force in a 75-turn coil of wire when there are 4 A of current through it?

300 AT
3 AT
30 AT
0.3 AT

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Magnetism and Electromagnetism
What is the reluctance of a material that has a length of 0.07 m, a cross-sectional area of 0.014 m2, and a permeability of 4,500 Wb/At × m?

11 At/Wb
111 At/Wb
1 At/Wb
1111 At/Wb

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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/4
2M
M
M/2

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Magnetism and Electromagnetism
The unit of relative permeability is

Hennry/meter
Its dimensionless
Hennry
None of the listed here

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Magnetism and Electromagnetism
Which of the following is the unit of magnetic flux density?

Tesla
Lumens
Weber
None of the listed here

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MORE MCQ ON Magnetism and Electromagnetism

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