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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The materials are a bit inferior conductors of magnetic flux than air.

Ferromagnetic
Diamagnetic
None of the listed here
Dielectric

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Magnetism and Electromagnetism
Magnetism of a magnet can be destroyed by

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

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Magnetism and Electromagnetism
Which of the following is expected to have the maximum permeability ?

Copper
Ebolite
Brass
Zinc

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Magnetism and Electromagnetism
The unit for permeability is

Wb/At × m
At/m
At/Wb
Wb

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Magnetism and Electromagnetism
When the current through the coil of an electromagnet reverses, the

magnetic field collapses
direction of the magnetic field remains unchanged
direction of the magnetic field reverses
magnetic field expands

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Magnetism and Electromagnetism
Susceptibility is positive for

non-magnetic substances
diamagnetic substances
None of these
ferromagnetic substances

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MORE MCQ ON Magnetism and Electromagnetism

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