Relative permeability of vacuum is__________?

Related Mcqs:

Hard steel is suitable for making permanent magnets because_____________?

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...

The unit of reluctance is_____________?

A. metre/henry B. henry/metre C. henry D. 1/henry...

In a magnetic material hysteresis loss takes place primarily due to___________?

A. rapid reversals of its magnetisation B. flux density lagging behind magnetising force C. molecular friction D. it 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...

A material for good magnetic memory should have____________?

A. low hysteresis loss B. high permeability C. low retentivity D. high retentivity...