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Electrical Engineering Mcqs

Dynamic equalizing circuit is used for________________?

  • (A)  equal division of voltage across each thyristor
  • (B)  equal division of current through each thyristor in parallel
  • (C)  equal division of voltage across each thyristor in parallel
  • (D)  equal division of current through each thyristor in series
Submitted By :Ali Uppal


Submitted By :Ali Uppal


Submitted By :Ali Uppal


If the gate voltage of an SCR is removed, then the_______________?

  • (A)  anode current decreases
  • (B)  anode current does not decrease at all
  • (C)  anode current increases
  • (D)  cathode current increases
Submitted By :Ali Uppal


Anode of an operational SCR is _______________?

  • (A)  Always positive w.r.t cathode
  • (B)  Always negative w.r.t anode
  • (C)  Always positive w.r.t anode
  • (D)  Always negative w.r.t cathode
Submitted By :Ali Uppal


An SCR is made up of silicon because?

  • (A)  silicon has large leakage current than germanium
  • (B)  silicon has small leakage current than germanium
  • (C)  silicon has small leakage voltage than germanium
  • (D)  silicon has large leakage voltage than germanium
Submitted By :Ali Uppal


In a silicon controlled rectifier, the load is connected___________?

  • (A)  Across anode
  • (B)  In series with anode
  • (C)  Across cathode
  • (D)  In series with cathode
Submitted By :Ali Uppal


AC power in a load can be controlled by using____________?

  • (A)  Two SCR’s in parallel opposition
  • (B)  Two SCR’s in series
  • (C)  Three SCR’s in series
  • (D)  Four SCR’s in series
Submitted By :Ali Uppal


Number of PN junction in an SCR is____________?

  • (A)  Two
  • (B)  Three
  • (C)  Four
  • (D)  Five
Submitted By :Ali Uppal


The switching function of semiconductor devices can be characterized with___________?

  • (A)  Duty ratio only
  • (B)  Frequency only
  • (C)  Duty ratio and frequency
  • (D)  Duty ratio, frequency and time delay
Submitted By :Ali Uppal