The rate of rise of current through an inductive coil is maximum_____________?

Related Mcqs:

1. 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...

2. Energy stored by a coil is doubled when its current is increased by percent___________?

   A. 25 B. 50 C. 41.4 D. 100...

3. When both the inductance and resistance of a coil are doubled the value of________________?

   A. time constant remains unchanged B. initial rate of rise of current is doubled C. final steady current is doubled D. time constant is halved...

4. 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...

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. 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...

7. Conductance is analogous to_____________?

   A. permeance B. reluctance C. flux D. inductance...

8. Silicon steel is used in electrical machines because it has_____________?

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

9. 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...

10. A material for good magnetic memory should have____________?

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