Electrical Engineering Mcqs

Why are the D.C. motors preferred for traction applications ?
  • (A)  Torque and speed are inversely proportional to armature current
  • (B)  Torque is proportional to armature current
  • (C)  Torque is proportional to square root of armature current
  • (D)  The speed is inversely proportional to the torque and the torque is proportional to square of armature current
In a manual shunt motor starter?
  • (A)  over load relay is connected in series and no volt relay in parallel with the load
  • (B)  over load relay is connected in parallel and no volt relay in series with the load
  • (C)  over load relay and no volt relay are both connected in series with the load
  • (D)  over load relay and no volt relay are both connected in parallel with the load