Electrical Machines
Consider the following statements regarding dc machines : 1. possible resistance of shunt-field winding is 1 Ω 2. possible resistance of series-field winding is 1 Ω 3. electrographite brushes are used for 230 V, 10 A machines 4. Copper-graphite brushes are used for 230 V, 10 A machines 5. Possible armature-circuit resistance is 1 Ω From these, the correct statements are

 2, 4 ,5
 1, 4
 2, 3 , 5
 1, 3, 5

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In a stepper motor the detente torque means

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

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Electrical Machines