A. high, high
B. low, high
C. high, low
D. low, low
A. low hysteresis loss
B. high permeability
C. low retentivity
D. high retentivity
A. zero
B. small
C. large
D. none of the above
A. 50
B. 20
C. 0.05
D. 500
A. at 63.2% of its maximum steady value
B. at the start of the current flow
C. after one time constant
D. near the final maximum value of current
A. alnico alloys
B. aluminium
C. cast iron
D. wrought iron
A. henry
B. weber
C. ampereturn/weber
D. ampere/metre
A. lowers their power efficiency
B. increases their cost of manufacture
C. leads to their increased weight
D. produces fringing
A. increase m.m.f.
B. increase the flux
C. prevent saturation
D. none of the above
A. rapid reversals of its magnetisation
B. flux density lagging behind magnetising force
C. molecular friction
D. it high retentivity