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Magnetic Circuit

Magnetic Circuit
The unit of retentivity is

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

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Magnetic Circuit
Those materials are well suited for making permanent magnets which have ________ retentivity and ________ coercivity.

Low, low
High, low
High, high
Low, high

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

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

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Magnetic Circuit
Reciprocal of reluctance is

Permeability
Reluctivity
Permeance
Susceptibility

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Magnetic Circuit
Ferrites have high hysteresis

None of the listed here
Ferrites have high resistance
Ferrites have high resistance
Ferrites have low permeability

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Magnetic Circuit
Relative permeability of vacuum is

6
5
1
3

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