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Magnetism and Electromagnetism

Magnetism and Electromagnetism
Magnetism of a magnet can be destroyed by

Heating
Hammering
By inductive action of another magnet
All of the listed here

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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

doubles
remains the same
increases
decreases

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Magnetism and Electromagnetism
Degaussing is the process of

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

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Magnetism and Electromagnetism
What will be the magnetic potential difference across the air gap of 2 cm length in magnetic field of 200 AT/m?

10 AT
4 AT
16 AT
8 AT

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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
Substances which have permeability less than the permeability of free space are known as

Bipolar
Ferro magnetic material
Paramagnetic material
Diamagnetic material

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MORE MCQ ON Magnetism and Electromagnetism

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