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Magnetic Circuit

Magnetic Circuit
If the area of hysteresis loop of a material is large, the hysteresis loss in this material will be

Small
Zero
None of the listed here
Large

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Magnetic Circuit
Hysteresis loss least depends on

Steinmetz’s coefficient of material
Volume of material
Frequency
Ambient temperature

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Magnetic Circuit
The rate of rise of current through an inductive coil is maximum

Near the final maximum value of current
After one time constant
At 63.2% of its maximum steady value
At the start of the current flow

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Magnetic Circuit
Ferrites have high hysteresis

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

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Magnetic Circuit
The unit of reluctance is

Meter/Henry
1/Henry
Henry
Henry/meter

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

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

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