Magnetic Circuit

A. it has good residual magnetism
B. its hysteresis loop has large area
C. its mechanical strength is high
D. its mechanical strength is low

A. low, high
B. high, high
C. high, low
D. low, low

A. retentivity
B. resistivity
C. permeability
D. inductance

A. time constant remains unchanged
B. initial rate of rise of current is doubled
C. final steady current is doubled
D. time constant is halved

A. 25
B. 50
C. 41.4
D. 100

A. 1
B. 1 H/m
C. 1/4JI
D. 4n x 10-‘ H/m

A. resistance
B. resistivity
C. conductivity
D. conductance

A. less than one
B. more than one
C. more than 10
D. more than 100 or 1000