Hysteresis loss least depends on____________?

Related Mcqs:

1. 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...

2. 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...

3. 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...

4. 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...

5. The relative permeability of a ferromagnetic material is_____________?

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

6. Conductivity is analogous to____________?

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

7. 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...

8. 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...

9. An air gap is usually inserted in magnetic circuits to____________?

   A. increase m.m.f. B. increase the flux C. prevent saturation D. none of the above...

10. 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

    A. 50 B. 20 C. 0.05 D. 500...