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Magnetic Circuit

Magnetic Circuit
The unit of reluctance is

Henry/meter
Meter/Henry
1/Henry
Henry

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Magnetic Circuit
Energy stored by a coil is doubled when its current is increased by percent.

42.5
41.4
44.6
47.5

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Magnetic Circuit
An air gap is usually inserted in magnetic circuits to

Increase the flux
None of the listed here
Prevent saturation
Increase m.m.f.

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Magnetic Circuit
The unit of magnetic flux is

Henry
Weber
Ampere-turn/weber
Ampere/metre

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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
The unit of retentivity is

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

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