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Magnetic Circuit

Magnetic Circuit
Relative permeability of vacuum is

5
3
6
1

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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
Lowers their power efficiency
Leads to their increased weight

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Magnetic Circuit
The relative permeability of a ferromagnetic material is

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

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

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

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Magnetic Circuit
The unit of retentivity is

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

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

Conductivity
Conductance
Resistance
Resistivity

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