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MCQs

Total Questions : 66 | Page 6 of 7 pages
Question 51. Mica manufactured by internal resistance melting method is melted at ______
  1.    1118°C
  2.    1208°C
  3.    1365°C
  4.    1480°C
 Discuss Question
Answer: Option C. -> 1365°C
Answer: (c).1365°C
Question 52. The measure of a material which helps to determine whether it is attracted to or repelled from a magnetic field is known as _______
  1.    Magnetization
  2.    Permeability
  3.    Frequency
  4.    Susceptibility
 Discuss Question
Answer: Option D. -> Susceptibility
Answer: (d).Susceptibility
Question 53. What is the temperature at which a phase transition from ferromagnetic to paramagnetic occurs?
  1.    Weiss
  2.    Curie
  3.    Neel
  4.    Debye
 Discuss Question
Answer: Option B. -> Curie
Answer: (b).Curie
Question 54. _______ is a weak magnetizing effect in which the material is attracted due to the application of magnetic force.
  1.    Diamagnetism
  2.    Ferromagnetism
  3.    Paramagnetism
  4.    Ferrimagnetism
 Discuss Question
Answer: Option C. -> Paramagnetism
Answer: (c).Paramagnetism
Question 55. Which material is considered as perfectly diamagnetic?
  1.    Copper
  2.    Gold
  3.    Superconductor
  4.    Water
 Discuss Question
Answer: Option C. -> Superconductor
Answer: (c).Superconductor
Question 56. _______ is a weak magnetizing effect in which magnetic lines of force are repelled.
  1.    Diamagnetism
  2.    Ferromagnetism
  3.    Paramagnetism
  4.    Ferrimagnetism
 Discuss Question
Answer: Option A. -> Diamagnetism
Answer: (a).Diamagnetism
Question 57. The heat treatment of alnico alloys at _____ results in phase separation.
  1.    100°C
  2.    200°C
  3.    400°C
  4.    800°C
 Discuss Question
Answer: Option D. -> 800°C
Answer: (d).800°C
Question 58. What is the hysteresis loss of permalloy?
  1.    500
  2.    120
  3.    40
  4.    21
 Discuss Question
Answer: Option B. -> 120
Answer: (b).120
Question 59. Which of the following is a property of a hard magnetic material?
  1.    Low hysteresis
  2.    Low eddy loss
  3.    Low coercive force
  4.    High residual induction
 Discuss Question
Answer: Option D. -> High residual induction
Answer: (d).High residual induction
Question 60. Which of the following is not a use of magnesium-manganese ferrites?
  1.    Microwave isolator
  2.    Gyrators
  3.    Wires
  4.    Memory core of computer
 Discuss Question
Answer: Option C. -> Wires
Answer: (c).Wires

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