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Magnetic Circuit

Magnetic Circuit
The unit of magnetic flux is

Henry
Weber
Ampere/metre
Ampere-turn/weber

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Magnetic Circuit
Those magnetic materials are best suited for making armature and transformer cores which have ________permeability and _________hysteresis loss.

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

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Magnetic Circuit
When both the inductance and resistance of a coil are doubled the value of

Initial rate of rise of current is doubled
Time constant is halved
Final steady current is doubled
Time constant remains unchanged

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Magnetic Circuit
The unit of reluctance is

Henry/meter
Henry
1/Henry
Meter/Henry

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

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

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Magnetic Circuit
The unit of retentivity is

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

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