- (A) permeance
- (B) reluctance
- (C) flux
- (D) inductance
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- (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
- (A) increase m.m.f.
- (B) increase the flux
- (C) prevent saturation
- (D) none of the above
