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MCQs

Total Questions : 330 | Page 8 of 33 pages
Question 71. If the charge in a conductor is 16C and the area of cross section is 4m². Calculate the electric flux density.
  1.    64C/m²
  2.    16C/m²
  3.    4C/m²
  4.    2C/m²
 Discuss Question
Answer: Option C. -> 4C/m²
Answer: (c).4C/m²
Question 72. What is relative permittivity?
  1.    Equal to the absolute permittivity
  2.    Ratio of actual permittivity to absolute permittivity
  3.    Ratio of absolute permittivity to actual permittivity
  4.    Equal to the actual permittivity
 Discuss Question
Answer: Option B. -> Ratio of actual permittivity to absolute permittivity
Answer: (b).Ratio of actual permittivity to absolute permittivity
Question 73. What happens to the capacitance of a multi plate capacitor when the number of plates increases?
  1.    Increases
  2.    Decreases
  3.    Remains constant
  4.    Becomes zero
 Discuss Question
Answer: Option A. -> Increases
Answer: (a).Increases
Question 74. Calculate the distance between the plates of the capacitor having C=20F, actual permittivity = 5F/m n=3 and A=4m².
  1.    1m
  2.    2m
  3.    3m
  4.    4m
 Discuss Question
Answer: Option B. -> 2m
Answer: (b).2m
Question 75. Find the capacitance of a multi plate capacitor whose relative permittivity=5, n=3, A=4m² and d=2m.
  1.    1.77*10¯¹⁰ F
  2.    1.77*10¹⁰ F
  3.    1.77*10¯¹¹ F
  4.    1.77*10¹¹ F
 Discuss Question
Answer: Option A. -> 1.77*10¯¹⁰ F
Answer: (a).1.77*10¯¹⁰ F
Question 76. Find the number of plates in the multi plate capacitor having C=20F absolute permittivity=5F/m, A=4m² and d=2m.
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option C. -> 3
Answer: (c).3
Question 77. Find the capacitance of a multi plate capacitor whose actual permittivity= 5F/m, n=3, A=4m²and d=2m.
  1.    10F
  2.    20F
  3.    30F
  4.    40F
 Discuss Question
Answer: Option B. -> 20F
Answer: (b).20F
Question 78. What happens to the capacitance when a dielectric is introduced between its plates?
  1.    Increases
  2.    Decreases
  3.    Remains the same
  4.    Becomes zero
 Discuss Question
Answer: Option A. -> Increases
Answer: (a).Increases
Question 79. Calculate the capacitance if the dielectric constant=4, area of cross section= 10m² and the distance of separation between the plates is 5m.
  1.    7.08*10¯¹¹F
  2.    7.08*10¹¹F
  3.    7.08*10¯¹²F
  4.    7.08*10¯¹⁰F
 Discuss Question
Answer: Option A. -> 7.08*10¯¹¹F
Answer: (a).7.08*10¯¹¹F
Question 80. Calculate the relative permittivity of the second dielectric if the relative permittivity of the first is 4. The electric field strength of the first dielectric is 8V/m and that of the second is 2V/m.
  1.    32
  2.    4
  3.    16
  4.    8
 Discuss Question
Answer: Option C. -> 16
Answer: (c).16

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