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Magnetic Circuit

Magnetic Circuit
The unit of retentivity is

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

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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
Point out the wrong statement. Magnetic leakage is undesirable in electric machines because it

Produces fringing
Increases their cost of manufacture
Leads to their increased weight
Lowers their power efficiency

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Magnetic Circuit
The relative permeability of a ferromagnetic material is

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

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Magnetic Circuit
While comparing magnetic and electric circuits, the flux of magnetic circuit is compared with which parameter of electrical circuit?

E.M.F
Current
Conductivity
Current density

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Magnetic Circuit
Permeability in a magnetic circuit corresponds to_________ in an electric circuit.

Resistivity
Resistance
Conductance
Conductivity

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