The initial rate of rise of current through a coil of inductance 10 H when suddenly connected to a D.C. supply of 200 V is__________Vs

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

A material for good magnetic memory should have____________?

A. low hysteresis loss

B. high permeability

C. low retentivity

D. 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

The rate of rise of current through an inductive coil is maximum_____________?

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

Permanent magnets are normally made of_____________?

A. alnico alloys

B. aluminium

C. cast iron

D. wrought iron