Electrical Machines
Consider the following statements : For a level compounded dc generator to run at constant voltage, the series field mmf must effectively compensate 1. armature reaction mmf 2.armature resistance drop 3. brush contact voltage drop Which of these statements is/are correct ?

 1 and 2
 2 alone
 1 and 3
 1, 2 and 3

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In a stepper motor the detente torque means

  maximum of the static torque with the phase winding excited.
  minimum of the static torque with the phase winding unexcited.
  maximum of the static torque with the phase winding unexcited.
  minimum of the static torque with the phase winding excited.

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Electrical Machines