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MCQs

Total Questions : 441 | Page 4 of 45 pages
Question 31. Which capacitor will be physically smaller for the same ratings ?
  1.    Ceramic capacitor
  2.    Paper capacitor
  3.    Both will be of equal size
  4.    None of the above
 Discuss Question
Answer: Option A. -> Ceramic capacitor
Question 32. The value of dielectric constant for vacuum is taken as
  1.    zero
  2.    1
  3.    4
  4.    10
 Discuss Question
Answer: Option B. -> 1
Question 33. The ohmmeter reading for a short circuited capacitor is
  1.    infinity
  2.    few kilo ohms
  3.    few megohms
  4.    zero
 Discuss Question
Answer: Option D. -> zero
Question 34. For which of the following parameter variation, the capacitance of the capacitor remains unaffected ?
  1.    Distance between plates
  2.    Area of the plates
  3.    Nature of dielectric
  4.    Thickness of the plates
 Discuss Question
Answer: Option D. -> Thickness of the plates
Question 35. The capacitor preferred for high frequency circuits is
  1.    air capacitor
  2.    mica capacitor
  3.    electrolytic capacitor
  4.    none of the above
 Discuss Question
Answer: Option B. -> mica capacitor
Question 36. A single core cable used on 33000 V has conductor diameter 10 mm and the internal diameter of sheath 25 mm. The maximum electrostatic stress in the cable is
  1.    62 x 105 V/m
  2.    72 x 105 V/m
  3.    82 x 105 V/m
  4.    92 x 105 V/m
 Discuss Question
Answer: Option B. -> 72 x 105 V/m
Question 37. An uncharged conductor is placed near a charged conductor, then
  1.    the uncharged conductor gets charged by conduction
  2.    the uncharged conductor gets charged by induction and then attracted towards the charging body
  3.    the uncharged conductor is attracted first and then charged by induction
  4.    it remains as such
 Discuss Question
Answer: Option B. -> the uncharged conductor gets charged by induction and then attracted towards the charging body
Question 38. A dielectric material must be
  1.    resistor
  2.    insulator
  3.    good conductor
  4.    semi conductor
 Discuss Question
Answer: Option B. -> insulator
Question 39. Which of the following expression is correct for electric field strength ?
  1.    E = D/E
  2.    E = D2/t
  3.    E = jtD
  4.    E= nD2
 Discuss Question
Answer: Option A. -> E = D/E
Question 40. The property of a capacitor to store electricity is called its
  1.    capacitance
  2.    charge
  3.    energy
  4.    none of the above
 Discuss Question
Answer: Option A. -> capacitance

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