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MCQs

Total Questions : 112 | Page 6 of 12 pages
Question 51. Which among the following, is a correct expression for µ₀.
  1.    µ₀=BH
  2.    µ₀=B/H
  3.    µ₀=H/B
  4.    µ₀=BH²
 Discuss Question
Answer: Option B. -> µ₀=B/H
Answer: (b).µ₀=B/H
Question 52. Calculate the magnetic flux density if the magnetic field strength is 3A/m.
  1.    4*pi*10¯⁷T
  2.    8*pi*10¯⁷T
  3.    10*pi*10¯⁷T
  4.    12*pi*10¯⁷T
 Discuss Question
Answer: Option D. -> 12*pi*10¯⁷T
Answer: (d).12*pi*10¯⁷T
Question 53. Calculate the magnetic field strength if the magnetic flux density is 4*piT.
  1.    10¯⁷/16*pi²A/m
  2.    10¯⁷A/m
  3.    10⁷A/m
  4.    10¯⁷A
 Discuss Question
Answer: Option C. -> 10⁷A/m
Answer: (c).10⁷A/m
Question 54. Calculate the magnetic flux density if the magnetic field strength is 2A/m.
  1.    4*pi*10¯⁷T
  2.    8*pi*10¯⁷T
  3.    10*pi*10¯⁷T
  4.    12*pi*10¯⁷T
 Discuss Question
Answer: Option B. -> 8*pi*10¯⁷T
Answer: (b).8*pi*10¯⁷T
Question 55. What is the unit for relative permeability?
  1.    H-m
  2.    H/m
  3.    H²/m
  4.    No unit
 Discuss Question
Answer: Option D. -> No unit
Answer: (d).No unit
Question 56. Which of the following expressions is correct with respect to relative permeability?
  1.    B = µᵣµ₀/H
  2.    B = µᵣµ₀H
  3.    B = µᵣ/µ₀H
  4.    B = µᵣµ₀/H²
 Discuss Question
Answer: Option B. -> B = µᵣµ₀H
Answer: (b).B = µᵣµ₀H
Question 57. Diamagnetic substances have relative permeability_____________
  1.    Greater than 1
  2.    Less than 1
  3.    Equal to 1
  4.    Zero
 Discuss Question
Answer: Option B. -> Less than 1
Answer: (b).Less than 1
Question 58. Paramagnetic substances have relative permeability_____________
  1.    Greater than 1
  2.    Less than 1
  3.    Equal to 1
  4.    Zero
 Discuss Question
Answer: Option A. -> Greater than 1
Answer: (a).Greater than 1
Question 59. A substance whose relative permeability is more than the permeability of free space is?
  1.    Diamagnetic
  2.    Paramagnetic
  3.    Ferromagnetic
  4.    Both paramagnetic and ferromagnetic
 Discuss Question
Answer: Option D. -> Both paramagnetic and ferromagnetic
Answer: (d).Both paramagnetic and ferromagnetic
Question 60. A substance whose relative permeability is less than the permeability of free space is?
  1.    Diamagnetic
  2.    Paramagnetic
  3.    Ferromagnetic
  4.    Not a magnetic substance
 Discuss Question
Answer: Option A. -> Diamagnetic
Answer: (a).Diamagnetic

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