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Magnetic Circuit

Magnetic Circuit
The relative permeability of a ferromagnetic material is

More than 100 Ωr 1000
More than one
Less than one
More than 10

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Magnetic Circuit
In a magnetic material hysteresis loss takes place primarily due to

Molecular friction
Flux density lagging behind magnetizing force
Rapid reversals of its magnetization
It high retentivity

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Magnetic Circuit
Reciprocal of reluctance is

Permeance
Permeability
Susceptibility
Reluctivity

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Magnetic Circuit
The property of a material which opposes the creation of magnetic flux in it is known as

Reluctivity
Permeance
Reluctance
Magneto-motive force

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Magnetic Circuit
The unit of retentivity is

Ampere turns
Weber
Weber/sq. m
Ampere turn/meter

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Magnetic Circuit
Relative permeability of vacuum is

5
3
1
6

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