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Magnetic Circuit

Magnetic Circuit
Relative permeability of vacuum is

1
3
5
6

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

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

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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?

Current
Current density
Conductivity
E.M.F

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

Conductance
Resistivity
Conductivity
Resistance

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Magnetic Circuit
A material for good magnetic memory should have

Low hysteresis loss
Low retentivity
High retentivity
High permeability

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