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

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. Hysteresis loss least depends on____________?

   A. volume of material B. frequency C. steinmetz coefficient of material D. ambient temperature...

3. 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...

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 property of a material which opposes the creation of magnetic flux in it is known as_____________?

   A. reluctivity B. magnetomotive force C. permeance D. reluctance...

6. A material for good magnetic memory should have____________?

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

7. Permeability in a magnetic circuit corresponds to________ in an electric circuit

   A. resistance B. resistivity C. conductivity D. conductance...

8. 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...

9. Point out the wrong statement. Magnetic leakage is undesirable in electric machines because it___________?

   A. lowers their power efficiency B. increases their cost of manufacture C. leads to their increased weight D. produces fringing...

10. The unit of magnetic flux is______________?

    A. henry B. weber C. ampereturn/weber D. ampere/metre...