The unit of reluctance is_____________?

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

Reciprocal of reluctance is_______________?

A. Reluctivity
B. Permeance
C. Permeability
D. Susceptibility

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

Silicon steel is used in electrical machines because it has_____________?

A. Low coercivity
B. Low retentivity
C. Low hysteresis loss
D. High coercivity

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

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

A. Copper loss
B. Eddy current loss
C. Hysteresis loss
D. All of the above

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

The unit of retentivity is____________?

A. Weber
B. Weber/sq. m
C. Ampere turn/meter
D. Ampere turn

Conductance is analogous to_____________?

A. Permeance
B. Reluctance
C. Flux
D. Inductance

Hard steel is suitable for making permanent magnets because_____________?

A. It has good residual magnetism
B. Its hysteresis loop has large area
C. Its mechanical strength is high
D. Its mechanical strength is low