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MCQs

Total Questions : 441 | Page 6 of 45 pages
Question 51. In a cable capacitor, voltage gradient is maximum at the surface of the
  1.    earth
  2.    conduction
  3.    sheath
  4.    insulator
 Discuss Question
Answer: Option B. -> conduction
Question 52. Three capacitors each of the capacity C are given. The resultant capacity 2/3 C can be obtained by using them
  1.    all in series
  2.    all in parallel
  3.    two in parallel and third in series with this combination
  4.    two in series and third in parallel across this combination
 Discuss Question
Answer: Option C. -> two in parallel and third in series with this combination
Question 53. Capacitance increases with
  1.    increase in plate area and decrease in distance between the plates
  2.    increase in plate area and distance between the plates
  3.    decrease in plate area and value of applied voltage
  4.    reduction in plate area and distance between the plates
 Discuss Question
Answer: Option A. -> increase in plate area and decrease in distance between the plates
Question 54. Mica capacitors are characterised by all of the following except
  1.    stable operation
  2.    accurate value
  3.    low leakage reactance
  4.    low losses
 Discuss Question
Answer: Option C. -> low leakage reactance
Question 55. If the sheet of a bakelite is inserted between the plates of an air capacitor, the capacitance will
  1.    decrease
  2.    increase
  3.    remains unchanged
  4.    become zero
 Discuss Question
Answer: Option B. -> increase
Question 56. Which of the following capacitors will have the least variation?
  1.    Paper capacitor
  2.    Ceramic capacitor
  3.    Silver plated mica capacitor
  4.    None of the above
 Discuss Question
Answer: Option C. -> Silver plated mica capacitor
Question 57. The number of Faraday tubes of flux passing through a surface in an electric field is called
  1.    electric flux
  2.    electric flux density
  3.    magnetic flux density
  4.    electric charge density
 Discuss Question
Answer: Option A. -> electric flux
Question 58. The value of E within the field due to a point charge can be found with the help of
  1.    Faraday’s laws
  2.    Kirchhoff's laws
  3.    Coulomb’s laws
  4.    none of the above
 Discuss Question
Answer: Option C. -> Coulomb’s laws
Question 59. Capacitors are used in transistor circuits.
  1.    Ceramic
  2.    Paper
  3.    Air
  4.    Electrolytic
 Discuss Question
Answer: Option A. -> Ceramic
Question 60. Dielectric strength of a medium is usually expressed in
  1.    J/mm
  2.    C/m²
  3.    kV/mm
  4.    N/mm
 Discuss Question
Answer: Option C. -> kV/mm

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