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Magnetic Circuit

Magnetic Circuit
Relative permeability of vacuum is

3
1
6
5

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Magnetic Circuit
The property of a material which opposes the creation of magnetic flux in it is known as

Permeance
Reluctance
Magneto-motive force
Reluctivity

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

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

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

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

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Magnetic Circuit
The unit of retentivity is

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

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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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