A. low hysteresis loss
B. high permeability
C. low retentivity
D. high retentivity
Related Mcqs:
- 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 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 - In a magnetic material hysteresis loss takes place primarily due to___________?
A. rapid reversals of its magnetisation
B. flux density lagging behind magnetising force
C. molecular friction
D. it high retentivity - 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 - Permeability in a magnetic circuit corresponds to________ in an electric circuit
A. resistance
B. resistivity
C. conductivity
D. conductance - An air gap is usually inserted in magnetic circuits to____________?
A. increase m.m.f.
B. increase the flux
C. prevent saturation
D. none of the above - 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 - Point out the wrong statement. Magnetic leakage is undesirable in electric machines because it___________?
A. lowers their power efficiency
B. increases their cost of manufacture
C. leads to their increased weight
D. produces fringing - The unit of magnetic flux is______________?
A. henry
B. weber
C. ampereturn/weber
D. ampere/metre - The relative permeability of a ferromagnetic material is_____________?
A. less than one
B. more than one
C. more than 10
D. more than 100 or 1000
