MAGNETIC CIRCUIT QUIZ

While comparing magnetic and electric circuits, the flux of magnetic circuit is compared with which parameter of electrical circuit?

Conductivity

E.M.F

Current density

Current

TRUE ANSWER : ?
YOUR ANSWER : ?

The unit of reluctance is

Henry/meter

1/Henry

Meter/Henry

Henry

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YOUR ANSWER : ?

Ferrites have high hysteresis

Ferrites have high resistance

None of the listed here

Ferrites have high resistance

Ferrites have low permeability

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YOUR ANSWER : ?

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

Conductivity

Conductance

Resistivity

Resistance

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The rate of rise of current through an inductive coil is maximum

At the start of the current flow

At 63.2% of its maximum steady value

After one time constant

Near the final maximum value of current

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YOUR ANSWER : ?

Conductivity is analogous to

Inductance

Resistivity

Retentivity

Permeability

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Those magnetic materials are best suited for making armature and transformer cores which have permeability and _hysteresis loss.

High, high

Low, high

High, low

Low, low

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Laminated cores, in electrical machines, are used to reduce

Copper loss

Hysteresis loss

Eddy current loss

All of the listed here

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

Reluctance

Permeance

Reluctivity

Magneto-motive force

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The initial rate of rise of current through a coil of inductance 10 H when suddenly connected to a D.C. supply of 200 V is ___________Vs

500

20

70

50

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YOUR ANSWER : ?

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