Hard steel is suitable for making permanent magnets because_____________?

Related Mcqs:

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...

Those materials are well suited for making permanent magnets which have ________ retentivity and _________ coercivity

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

A ferrite core has less eddy current loss than an iron core because_______________?

A. ferrites have high resistance B. ferrites are magnetic C. ferrites have low permeability D. ferrites have high hysteresis...

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...

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...