The unit of reluctance is_____________?

Related Mcqs:

1. Reciprocal of reluctance is_______________?

   A. reluctivity
   B. permeance
   C. permeability
   D. susceptibility

2. 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

3. The unit of retentivity is____________?

   A. weber
   B. weber/sq. m
   C. ampere turn/meter
   D. ampere turn

4. The unit of magnetic flux is______________?

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

5. Conductivity is analogous to____________?

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

6. 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

7. 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

8. 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

9. 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

10. 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