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Magnetic Circuit

Hysteresis loss least depends on____________?

August 11, 2021December 16, 2018 by admin
Hysteresis loss least depends on____________?

A. volume of material
B. frequency
C. steinmetz coefficient of material
D. ambient temperature

Categories Magnetic Circuit

The unit of reluctance is_____________?

August 11, 2021December 16, 2018 by admin
The unit of reluctance is_____________?

A. metre/henry
B. henry/metre
C. henry
D. 1/henry

Categories Magnetic Circuit

Reciprocal of reluctance is_______________?

August 11, 2021December 16, 2018 by admin
Reciprocal of reluctance is_______________?

A. reluctivity
B. permeance
C. permeability
D. susceptibility

Categories Magnetic Circuit

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

August 11, 2021December 16, 2018 by admin
The property of a material which opposes the creation of magnetic flux in it is known as_____________?

A. reluctivity
B. magnetomotive force
C. permeance
D. reluctance

Categories Magnetic Circuit

Silicon steel is used in electrical machines because it has_____________?

August 11, 2021December 16, 2018 by admin
Silicon steel is used in electrical machines because it has_____________?

A. low coercivity
B. low retentivity
C. low hysteresis loss
D. high coercivity

Categories Magnetic Circuit

A ferrite core has less eddy current loss than an iron core because_______________?

August 11, 2021December 16, 2018 by admin
A ferrite core has less eddy current loss than an iron core because_______________?

A. ferrites have high resistance
B. ferrites are magnetic
C. ferrites have low permeability
D. ferrites have high hysteresis

Categories Magnetic Circuit

Laminated cores, in electrical machines, are used to reduce____________?

August 11, 2021December 16, 2018 by admin
Laminated cores, in electrical machines, are used to reduce____________?

A. copper loss
B. eddy current loss
C. hysteresis loss
D. all of the above

Categories Magnetic Circuit

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

August 11, 2021December 16, 2018 by admin
While comparing magnetic and electric circuits, the flux of magnetic circuit is compared with which parameter of electrical circuit ?

A. E.m.f.
B. Current
C. Current density
D. Conductivity

Categories Magnetic Circuit

The unit of retentivity is____________?

August 11, 2021December 16, 2018 by admin
The unit of retentivity is____________?

A. weber
B. weber/sq. m
C. ampere turn/meter
D. ampere turn

Categories Magnetic Circuit

Conductance is analogous to_____________?

August 11, 2021December 16, 2018 by admin
Conductance is analogous to_____________?

A. permeance
B. reluctance
C. flux
D. inductance

Categories Magnetic Circuit
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