# Multiple Choice Questions (MCQs) Based On Magnetism

The Multiple Choice Questions (MCQs) Based On Magnetism are as follows:

01. Name the following: _______________ of material is defined as ratio of the number of lines of magnetic induction per unit area in that material to the number of magnetic lines per unit area that would be present in vacuum.

02. Susceptibility of a magnetic material is defined as the ratio of _________ induced in material to magnetic field intensity (H)

03. Those substances which are weakly magnetized in the direction opposite to that of the external magnetic field are called as ___________

04. The magnetic field that exists in vacuum and induces magnetism is called _____________

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05. Those substances which are weakly magnetized in the direction of the external magnetic field are called as ___________

06. Find Odd one out for Strength of Magnetization: Diamagnetic, Paramagnetic and Ferromagnetic

07. The group of atomic magnets aligned in one direction due to exchange coupling is called as _______

08. The temperature at which the domain structure gets destroyed and ferromagnetic substance is converted into paramagnetic substance is called as ___________

09. _______ rings are used for tracing hysteresis curves for iron rings

10. The ability of magnetizing field to magnetize a material medium is called ____________

11. The Curie Temperature (°K ) for Cobalt is _________ °K

12. Magnetization (Mz) = χ H, Where (χ) is called _____________ and (H) is Magnetic Intensity

13. Relative Magnetic Permeability (μr) = ____________
(a) 1 – χ
(b) χ – 1
(c) χ – H
(d) 1 + χ

14. The ratio of magnetic dipole moment with angular momentum of revolving electron is called ___________

15. Magnetic Dipole Moment (M) for an electron is __________ A.m²

16. The various SI units of Magnetizing Field (B0) are _______, _________ and _________

17. The units of Magnetic Permeability (μ) are _________ and ___________

18. The ____________ of magnetic material is defines as the magnetic moment per unit volume of the material. It represents the extent to which a specimen is magnetized, when placed in a magnetizing field.

19. Those substances which are strongly magnetized in the direction of the external magnetic field are called as ________

20. When placed in non-uniform magnetic field, how do Ferromagnetic substances move from one part of the field to another?

21. The magnetic permeability of a material is defined as ratio of magnetic induction (B) to ______

22. Above Curie temperature, Ferromagnetic substances become _________

23. When external magnetic field is removed, how do Paramagnetic substances retain magnetism?

24. The ________ is defined as pole strength per unit area of cross section of material.

25. The Curie Temperature (°K ) for Nickel is _________ °K

26. The degree or extent to which magnetic field can penetrate or permeate a material is called ___________

27. Find Odd one out for Direction of magnetization with respect to External Magnetic Field: Diamagnetic, Paramagnetic and Ferromagnetic

28. Hysteresis curves are plots of magnetic _________ as a function of magnetizing field

29. Total number of magnetic lines of force crossing per unit area normally through a material is called ________

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## Answers: Multiple Choice Questions (MCQs) Based On Magnetism

01. Relative Magnetic Permeability:
02. Intensity of magnetization (I)
03. Diamagnetic Substances
04. magnetizing Field
05. Paramagnetic Substances
06. Ferromagnetic (It is strongly magnetized; rest are weakly magnetized}
07. Domain
08. Curie Temperature
09. Rowland
10. Magnetic Field Intensity
11. 1394
12. Magnetic Susceptibility
13. (d) 1 + χ
14. Gyromagnetic Ratio
15. -9284.764 E-27
16. Wb/m², Tesla (T) and N/A.m
17. (T.m/A) and (W/A.m)
18. Intensity of magnetization
19. Ferromagnetic Substances
20. They move with a strong tendency from weaker part to stronger part of field
21. magnetic intensity (H)
22. paramagnetic
23. They loose their magnetism
24. Intensity of magnetization
25. 631
26. Magnetic Permeability
27. Diamagnetic (for this substance the Direction of magnetization is opposite to External Magnetic Field}
28. induction
29. Magnetic Induction

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