magnetic circuit MCQs – Page 2

Practise focused magnetic circuit questions with marked answers for exam preparation and subject revision.

magnetic circuit Mcqs
21. The unit of reluctance is_____________?
comments icon0

A. metre/henry

B. 1/henry

C. henry/metre

D. henry

22. Point out the wrong statement. Magnetic leakage is undesirable in electric machines because it___________?
comments icon0

A. produces fringing

B. leads to their increased weight

C. lowers their power efficiency

D. increases their cost of manufacture

23. Permeability in a magnetic circuit corresponds to________ in an electric circuit
comments icon0

A. resistance

B. conductivity

C. resistivity

D. conductance

24. A ferrite core has less eddy current loss than an iron core because_______________?
comments icon0

A. ferrites are magnetic

B. ferrites have high resistance

C. ferrites have high hysteresis

D. ferrites have low permeability

25. Hard steel is suitable for making permanent magnets because_____________?
comments icon0
A. it has good residual magnetism

B. its mechanical strength is high

C. its hysteresis loop has large area

D. its mechanical strength is low

26. Conductivity is analogous to____________?
comments icon0

A. resistivity

B. permeability

C. inductance

D. retentivity

27. Permanent magnets are normally made of_____________?
comments icon0
A. alnico alloys

B. aluminium

C. wrought iron

D. cast iron

28. Reciprocal of reluctance is_______________?
comments icon0

A. reluctivity

B. permeance

C. permeability

D. susceptibility