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Electrical Engineering Mcqs

IGBT stands for___________?

  • (A)  Insulated gate bipolar transistor
  • (B)  Insulated gate bidirectional transistor
  • (C)  Inductive gate bipolar transistor
  • (D)  Inductive gate bidirectional transistor
Submitted By :Ali Uppal


Electrical power output in a d.c. generator is equal to____________?

  • (A)  Electrical power developed in armature – copper losses
  • (B)  Mechanical power input – iron and friction losses
  • (C)  Electrical power developed in armature – iron and copper losses
  • (D)  Mechanical power input – iron and friction losses – copper losses
Submitted By :Ali Uppal


An ideal switch is___________?

  • (A)  Lossless
  • (B)  Carry current in any direction when it is on
  • (C)  Does not carry any current in any direction when it is off
  • (D)  All of these
Submitted By :Ali Uppal


In a 3 phase bridge rectifier the ripple frequency is _____________?

  • (A)  Equal to the input frequency
  • (B)  Twice the input frequency
  • (C)  Three times the input frequency
  • (D)  Six times the input frequency
Submitted By :Ali Uppal


In a load commutated DC – DC chopper, the capacitor has a_____________?

  • (A)  Symmetric triangular voltage across itself
  • (B)  Symmetric rectangular voltage across itself
  • (C)  Symmetric trapezoidal voltage across itself
  • (D)  Symmetric sinusoidal voltage across itself
Submitted By :Ali Uppal


The sum of all phase current in a star connected primary winding with no neutral connection is equal to___________?

  • (A)  Phase current
  • (B)  Three times the phase current
  • (C)  Three times the line current
  • (D)  Zero at all times
Submitted By :Ali Uppal


For power output higher than 15 kW, the suitable rectifier is________________?

  • (A)  Single phase
  • (B)  3 phase
  • (C)  Poly phase
  • (D)  Only (b) and (c)
Submitted By :Ali Uppal


Submitted By :Ali Uppal


LISN is a device used to measure conducted emissions. LISN stands for_____________?

  • (A)  Line integrated stabilization network
  • (B)  Line impedance stabilization network
  • (C)  Line integrated stored network
  • (D)  Laser integrated stabilization networking
Submitted By :Ali Uppal


Submitted By :Ali Uppal