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Magnetism and Electromagnetism

Magnetism and Electromagnetism
What is the magneto-motive force in a 75-turn coil of wire when there are 4 A of current through it?

300 AT
0.3 AT
30 AT
3 AT

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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
a downward force
no force
a force of attraction

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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

Is zero
Decrease
Increase
None of the listed here

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Magnetism and Electromagnetism
The ratio of intensity of magnetisation to the magnetisation force is known as

Flux density
Relatice permeability
Susceptibility
None of the listed here

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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 permeability at the end of the iron rod
The highest permeability of the iron rod

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

retentivity
reluctance
permeability
hysteresis

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MORE MCQ ON Magnetism and Electromagnetism

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