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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

None of the listed here
Small
Large
Zero

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

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

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Magnetic Circuit
A material for good magnetic memory should have

Low hysteresis loss
High retentivity
Low retentivity
High permeability

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Magnetic Circuit
The initial rate of rise of current through a coil of inductance 10 H when suddenly connected to a D.C. supply of 200 V is ___________Vs

500
70
20
50

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Magnetic Circuit
The unit of retentivity is

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

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Magnetic Circuit
Ferrites have high hysteresis

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

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