Magnetism MCQs Quiz Multiple Choice Questions & Answers

1. Basic source of magnetism is

1. Charged particles alone
2. Movement of charged particles
3. Magnetic dipoles
4. Magnetic domains

2. Units for magnetic flux density is

1. weber per meter square
2. Wb / A.m
3. A / m
4. Tesla / m

3. Magnetic permeability has units as

1. weber per meter square
2. Wb / A.m
3. A / m
4. Tesla / m

4. Magnetic permeability has units as

1. Tesla
2. Henry
3. Tesla / m
4. Henry / m

5. Magnetic field strength units are

1. weber per meter square
2. Wb / A.m
3. A / m
4. Tesla / m

6. Example for dia-magnetic materials

1. super conductors
2. alkali metals
3. transition metals
4. Ferrites

7. Example for para-magnetic materials

1. super conductors
2. alkali metals
3. transition metals
4. Ferrites

8. Example for ferro-magnetic materials

1. super conductors
2. alkali metals
3. transition metals
4. Ferrites

9. Example for anti-ferro-magnetic materials

1. salts of transition elements
2. rare earth elements
3. transition metals
4. Ferrites

10. Example for ferri-magnetic materials

1. salts of transition elements
2. rare earth elements
3. transition metals
4. Ferrites

11. Electromagnets are used in

1. loud speakers
2. door bells
3. both a and b
4. cabinet doors

12. Magnetic susceptibility para-magnetic materials is

1. +10 raised to -5
2. -10 raised to -5
3. 10 raised to 5
4. 10 raised to -5 to 10 raised to -2

13. Magnetic susceptibility dia--magnetic materials is

1. +10 raised to -5
2. -10 raised to -5
3. 10 raised to 5
4. 10 raised to -5 to 10 raised to -2

14. Magnetic susceptibility ferro-magnetic materials is

1. +10 raised to -5
2. -10 raised to -5
3. 10 raised to 5
4. 10 raised to -5 to 10 raised to -2

15. Typical size of magnetic domains ................(mm).

1. 10-1
2. 0.1-1
3. 0.05
4. 0.001

16. Typical thickness of Bloch walls ................(nm).

1. 0.1-1
2. 10-1
3. 10-50
4. 100

17. Example for soft magnet

1. 45 Permalloy
2. CrO2
3. Fe-Pd
4. Alnico

18. Example for hard magnet

1. 45 Permalloy
2. CrO2
3. Fe-Pd
4. Alnico

19. Example for magnetic material used in data storage devices

1. 45 Permalloy
2. CrO2
3. Cunife
4. Alnico