Indicate which of the following material does not retain magnetism permanently

Related Mcqs:

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

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

2. Magnetism of a magnet can be destroyed by_____________?

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

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. Materials subjected to rapid reversal of magnetism should have______________?

   A. large area oiB-H loop B. high permeability and low hysteresis loss C. high co-ercivity and high retentivity D. high co-ercivity and low density...

5. Which of the following is a ferromagnetic material ?

   A. Tungsten B. Aluminium C. Copper D. Nickel...

6. he retentivity (a property) of material is useful for the construction of_______________?

   A. permanent magnets B. transformers C. non-magnetic substances D. electromagnets...

7. he retentivity (a property) of material is useful for the construction of__________?

   A. permanent magnets B. transformers C. non-magnetic substances D. electromagnets...

8. A material which is slightly repelled by a magnetic field is known as_____________?

   A. ferromagnetic material B. diamagnetic material C. paramagnetic material D. conducting material...

9. How does the magnetic compass needle behave in a magnetic field ?

   A. It assures a position right angle to magnetic field B. It starts rotating C. It assures a position which follows a line of magnetic flux D. None of the above...

10. When a magnet is in motion relative to a coil the induced e.m.f. does not depend upon____________?

    A. resistance of the coil B. motion of the magnet C. number of turns of the coil D. pole strength of the magnet...