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Magnetism and Electromagnetism

Magnetism and Electromagnetism
Air gap has_______eluctance as compared to iron or steel path

higher
little
lower
zero

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Magnetism and Electromagnetism
Degaussing is the process of

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

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Magnetism and Electromagnetism
When the north poles of two bar magnets are brought close together, there will be

a force of repulsion
no force
a downward force
a force of attraction

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Magnetism and Electromagnetism
For which of the following materials the net magnetic moment should be zero?

antiferrimagnetic materials
antiferromagnetic materials
ferrimagnetic materials
diamagnetic materials

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Magnetism and Electromagnetism
The magnetism left in the iron after exciting field has been removed is known as

susceptance
permeance
residual magnetism
reluctance

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Magnetism and Electromagnetism
Hysteresis loop in case of magnetically hard materials is more in shape as compared to magnetically soft materials.

None of the listed here
circular
triangular
rectangular

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