A. low, high
B. high, high
C. high, low
D. low, low
Related Mcqs:
- Those magnetic materials are best suited for making armature and transformer cores which have ________ permeability and ________ hystersis loss
A. high, high
B. low, high
C. high, low
D. low, low - 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 - Permanent magnets are normally made of_____________?
A. alnico alloys
B. aluminium
C. cast iron
D. wrought iron - The unit of retentivity is____________?
A. weber
B. weber/sq. m
C. ampere turn/meter
D. ampere turn - Conductivity is analogous to____________?
A. retentivity
B. resistivity
C. permeability
D. inductance - 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 - Silicon steel is used in electrical machines because it has_____________?
A. low coercivity
B. low retentivity
C. low hysteresis loss
D. high coercivity - Hysteresis loss least depends on____________?
A. volume of material
B. frequency
C. steinmetz coefficient of material
D. ambient temperature - 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
A. 50
B. 20
C. 0.05
D. 500 - If the area of hysteresis loop of a material is large, the hysteresis loss in this material will be____________?
A. zero
B. small
C. large
D. none of the above
