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Magnetism and Electromagnetism

Magnetism and Electromagnetism
What is the flux density when the flux is 5.5 Wb and the cross-sectional area is 6 × 10–3 m2?

91.7 T
9.7 T
917 T
91 T

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

300 At
187 At
18.75 At
30 At

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Magnetism and Electromagnetism
Reciprocal of permeability is

conductance
Susceptibility
Permeability
Reluctivity

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

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

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Magnetism and Electromagnetism
Degaussing is the process of

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

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Magnetism and Electromagnetism
The relative permeability is less than unity is case of

Ferromagnetic material
Paramagnetic material
Ferrits
Diamagnetic material

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MORE MCQ ON Magnetism and Electromagnetism

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