A. it corrodes easily
B. it has high permeability
C. it has high specific gravity
D. it has low permeability
Related Mcqs:
- Air gap has_________eluctance as compared to iron or steel path?
A. little
B. lower
C. higher
D. zero - Which of the following statements is correct ?
A. The conductivity of ferrites is better than ferromagnetic materials
B. The conductivity of ferromagnetic materials is better than ferrites
C. The conductivity of ferrites is very high
D. The conductivity of ferrites is same as that of ferromagnetic materials - For which of the following materials the saturation value is the highest ?
A. Ferromagnetic materials
B. Paramagnetic materials
C. Diamagnetic materials
D. Ferrites - The uniform magnetic field is______________?
A. the field of a set of parallel conductors
B. the field of a single conductor
C. the field in which all lines of magnetic flux are parallel and equidistant
D. none of the above - he retentivity (a property) of material is useful for the construction of_______________?
A. permanent magnets
B. transformers
C. non-magnetic substances
D. electromagnets - The commonly used material for shielding or screening magnetism is____________?
A. copper
B. aluminium
C. soft iron
D. brass - The magnetism left in the iron after exciting field has been removed is known as____________?
A. permeance
B. residual magnetism
C. susceptance
D. reluctance - Which of the following is the unit of magnetic flux density ?
A. weber
B. lumens
C. tesla
D. none of the above - The left hand rule correlates to______________?
A. current, induced e.m.f. and direction of force on a conductor
B. magnetic field, electric field and direction of force on a conductor
C. self induction, mutual induction and direction of force on a conductor
D. current, magnetic field and direction of force on a conductor - The materials having low retentivity are suitable for making_____________?
A. weak magnets
B. temporary magnets
C. permanent magnets
D. none of the above
