Questions on Magnetic Circuit Multiple choice Questions and Answers pdf

26. 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
Ans: d

27. Hysteresis loss least depends on
(a)     volume of material
(b)     frequency
(c) steinmetz co-efficient of material
(d) ambient temperature
Ans: d

28. Laminated cores, in electrical machines, are used to reduce
(a) copper loss
(b) eddy current loss
(c) hysteresis loss
(d) all of the above
Ans: b

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