Electrical Machines
The current drawn by the armature of DC motor is directly proportional to

 The torque required.
 None of above.
 The voltage across the terminals.
 The speed of motor.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In a dc generator operating on load with its brushes on the geometrical neutral axis (GNA), the magnetic neutral axis (MNA) is shifted in the direction of rotation. Now, if the brushes are given a lead of 90° (electrical), then the MNA will

 shift forward by more than 90°
 coincide with the GNA
 shift forward by 90°
 shift forward by less than 90°

ANSWER DOWNLOAD EXAMIANS APP