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MCQs

Total Questions : 441 | Page 8 of 45 pages
Question 71. A region around a stationary electric charge has
  1.    An electric field
  2.    A magnetic field
  3.    Both (A) and (B)
  4.    None of the above
 Discuss Question
Answer: Option A. -> An electric field
Question 72. A gang condenser is a
  1.    polarised capacitor
  2.    variable capacitor
  3.    ceramic capacitor
  4.    none of the above
 Discuss Question
Answer: Option B. -> variable capacitor
Question 73. Paper capacitors usually have a tolerance of
  1.    ± 5%
  2.    ± 10%
  3.    ± 15%
  4.    ± 20%
 Discuss Question
Answer: Option B. -> ± 10%
Question 74. If a 6 uF capacitor is charged to 200 V, the charge in coulombs will be
  1.    800 uC
  2.    900 uC
  3.    1200 uC
  4.    1600 uC
 Discuss Question
Answer: Option C. -> 1200 uC
Question 75. A capacitor having capacitance of 5 uF is charged to a potential difference of 10,000 V. The energy stored in the capacitor is
  1.    50 joules
  2.    150 joules
  3.    200 joules
  4.    250 joules
 Discuss Question
Answer: Option D. -> 250 joules
Question 76. Electric displacement is a______quantity.
  1.    scalar
  2.    vector
  3.    both of the above
  4.    none of the above
 Discuss Question
Answer: Option B. -> vector
Question 77. Dielectric strength of a material depends on
  1.    moisture content
  2.    temperature
  3.    thickness
  4.    all of the above
 Discuss Question
Answer: Option D. -> all of the above
Question 78. Dielectric strength of mica is
  1.    10 to 20 kV/mm
  2.    30 to 50 kV/mm
  3.    50 to 200 kV/mm
  4.    300 to 500 kV/mm
 Discuss Question
Answer: Option C. -> 50 to 200 kV/mm
Question 79. If A.C. voltage is applied to capacitive circuit, the alternating current can flow in the circuit because
  1.    varying voltage produces the charging and dicharging currents
  2.    of high peak value
  3.    charging current can flow
  4.    discharge current can flow
 Discuss Question
Answer: Option A. -> varying voltage produces the charging and dicharging currents
Question 80. The relative permittivity has the following units
  1.    F/m
  2.    m/F
  3.    Wb/m
  4.    no units
 Discuss Question
Answer: Option D. -> no units

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