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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The ability of a material to remain magnetized after removal of the magnetizing force is known as

hysteresis
reluctance
permeability
retentivity

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Magnetism and Electromagnetism
The initial permeability of an iron rod is

The permeability almost in non-magnetised state
The lowest permeability of the iron rod
The highest permeability of the iron rod
The permeability at the end of the iron rod

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Magnetism and Electromagnetism
The bar magnet has

Dipole moment
None of the listed here
Both dipole and monopole moment
Monopole moment

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Magnetism and Electromagnetism
Core of an electromagnet should have

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

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Magnetism and Electromagnetism
The electromagnet has 50 turns and a current of 1A flows through the coil. If the length of the magnet circuit is 200 mm, what is the magnetic field strength?

0.25 AT/m
250 AT/m
25 AT/m
2500 AT/m

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Magnetism and Electromagnetism
If the steel disk in a crankshaft position sensor has stopped with the tab in the magnet's air gap, the induced voltage

Increase
Decrease
Is zero
None of the listed here

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MORE MCQ ON Magnetism and Electromagnetism

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