Latest Magnetism and Electromagnetism Multiple choice Questions and Answers pdf

31. Ferrites are a sub-group of
(a)     non-magnetic materials
(6)     ferro-magnetic materials
(c) paramagnetic materials
(d) ferri-magnetic materials
Ans: d

32. Gilbert is a unit of
(a) electromotive force
(6) magnetomotive force
(c) conductance  
(d) permittivity
Ans: b

33. The working of a meter is based on the use of a permanent magnet. In order to protect the meter functioning from stray magnetic fields
(a)     meter is surrounded by strong magnetic fields
(b)     a soft iron shielding is used
(c) a plastic shielding is provided
(d) a shielding of anon-magnetic material is used
Ans: b

34. Reciprocal of permeability is
(a) reluctivity
(b) susceptibility
(c) permittivity  
(d) conductance
Ans: a

35. The relative permeability is less than unity is case of
(a)     ferromagnetic materials
(b)     ferrites
(c) non-ferrous materials
(d) diamagnetic materials
Ans: d

36. Which of the following is the unit of magnetic flux density ?
(a)     weber
(b)     lumens
(c) tesla
(d) none of the above
Ans: c

37. The magnetism left in the iron after exciting field has been removed is known as
(a) permeance
(b) residual magnetism
(c) susceptance  
(d)     reluctance
Ans: b

38. Which of the following is not a unit of flux?
(a) Maxwell
(b) Telsa
(c) Weber
(d) All of the above
Ans: b

39. Which of the following is expected to have the maximum permeability ?
(a) Brass
(b) Copper
(c) Zinc
(d) Ebonite
Ans: d

40. One telsa is equal to
(a) 1 Wb/mm2
(b) 1 Wb/m
(c) 1 Wb/m2
(d) 1 mWb/m2
Ans: c

Read More Questions:
Magnetism and Electromagnetism MCQs Part1
Magnetism and Electromagnetism MCQs Part2
Magnetism and Electromagnetism MCQs Part3
Magnetism and Electromagnetism MCQs Part4
Magnetism and Electromagnetism MCQs Part5
Magnetism and Electromagnetism MCQs Part6
Magnetism and Electromagnetism MCQs Part7
Magnetism and Electromagnetism MCQs Part8
Magnetism and Electromagnetism MCQs Part9
Magnetism and Electromagnetism MCQs Part10