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Magnetism and Electromagnetism

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

Diamagnetic
None of the listed here
Ferromagnetic
Dielectric

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Magnetism and Electromagnetism
Susceptibility is positive for

non-magnetic substances
None of these
ferromagnetic substances
diamagnetic substances

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Magnetism and Electromagnetism
For a given wirewound core, an increase in current through the coil

increases the flux density
decreases the flux density
reverses the flux lines
causes no change in flux density

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

reluctance
permeance
residual magnetism
susceptance

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Magnetism and Electromagnetism
Core of an electromagnet should have

None of the listed here
High susceptibility
Low coercivity
Both low coercivity and high susceptibility

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Magnetism and Electromagnetism
Magnetism of a magnet can be destroyed by

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

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MORE MCQ ON Magnetism and Electromagnetism

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