Materials subjected to rapid reversal of magnetism should have______________?

Related Mcqs:

1. Magnetism of a magnet can be destroyed by_____________?

   A. heating B. hammering C. by inductive action of another magnet D. by all above methods...

2. The commonly used material for shielding or screening magnetism is____________?

   A. copper B. aluminium C. soft iron D. brass...

3. The magnetism left in the iron after exciting field has been removed is known as____________?

   A. permeance B. residual magnetism C. susceptance D. reluctance...

4. Indicate which of the following material does not retain magnetism permanently

   A. Soft iron B. Stainless steel C. Hardened steel D. None of the above...

5. Hysteresis loop in case of magnetically hard materials is more in shape as compared to magnetically soft materials

   A. circular B. triangular C. rectangular D. none of the above...

6. The susceptibility of paramagnetic materials generally lies between____________?

   A. KT3 and 1CT6 B. 1CT3 and 1CT7 C. KT4 and KT8 D. 10″2 and KT5...

7. Which of the following materials are diamagnetic ?

   A. Silver B. Copper C. Silver and copper D. Iron...

8. Which of the following type of materials are not very important for engineering applications ?

   A. Ferromagnetic B. Paramagnetic C. Diamagnetic D. None of the above...

9. The materials are a bit inferior conductors of magnetic flux than air

   A. ferromagnetic B. paramagnetic C. diamagnetic D. dielectric...

10. Paramagnetic materials have relative permeability________________?

    A. slightly less than unity B. equal to unity C. slightly more than unity D. equal to that ferromagnetic mate rials...