A. 1
B. 1 H/m
C. 1/4JI
D. 4n x 10-‘ H/m
Related Mcqs:
- 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 - Permeability in a magnetic circuit corresponds to________ in an electric circuit
A. resistance
B. resistivity
C. conductivity
D. conductance - 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 - The unit of retentivity is____________?
A. weber
B. weber/sq. m
C. ampere turn/meter
D. ampere turn - 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 - Reciprocal of reluctance is_______________?
A. reluctivity
B. permeance
C. permeability
D. susceptibility - Hysteresis loss least depends on____________?
A. volume of material
B. frequency
C. steinmetz coefficient of material
D. ambient temperature - 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 - A material for good magnetic memory should have____________?
A. low hysteresis loss
B. high permeability
C. low retentivity
D. high retentivity
