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Magnetic Circuit

Magnetic Circuit
Relative permeability of vacuum is

3
6
5
1

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Magnetic Circuit
Laminated cores, in electrical machines, are used to reduce

Eddy current loss
Hysteresis loss
All of the listed here
Copper loss

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Magnetic Circuit
The unit of retentivity is

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

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Magnetic Circuit
The unit of reluctance is

Henry
Meter/Henry
1/Henry
Henry/meter

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Magnetic Circuit
Silicon steel is used in electrical machines because it has

Low coercivity
High coercivity
Low retentivity
Low hysteresis loss

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Magnetic Circuit
The relative permeability of a ferromagnetic material is

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

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