Electrical Machines
A triangular mmf wave is produced in the air gap of an electric machine. Such wave is produced by

 stator of a induction machine.
 stator of a dc machine.
 rotor of a dc machine.
 rotor of an synchronous machine.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The speed of a DC series motor is

 Proportional to the armature current.
 Proportional to field current.
 Proportional to the square of the armature current.
 Inversely proportional to the armature current.

ANSWER DOWNLOAD EXAMIANS APP