MAGNETIC CIRCUIT QUIZ

In a magnetic material hysteresis loss takes place primarily due to

Flux density lagging behind magnetizing force

It high retentivity

Rapid reversals of its magnetization

Molecular friction

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Relative permeability of vacuum is

6

5

1

3

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Reciprocal of reluctance is

Susceptibility

Permeance

Permeability

Reluctivity

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

Resistivity

Conductivity

Conductance

Resistance

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Ferrites have high hysteresis

Ferrites have low permeability

Ferrites have high resistance

None of the listed here

Ferrites have high resistance

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Conductance is analogous to

Flux

Reluctance

Permeance

Inductance

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Silicon steel is used in electrical machines because it has

Low retentivity

High coercivity

Low coercivity

Low hysteresis loss

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Laminated cores, in electrical machines, are used to reduce

Eddy current loss

Hysteresis loss

All of the listed here

Copper loss

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Those materials are well suited for making permanent magnets which have retentivity and coercivity.

High, low

High, high

Low, low

Low, high

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The unit of reluctance is

Henry

Henry/meter

1/Henry

Meter/Henry

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