Electrical Machines
In DC machine, the armature windings are placed on the rotor because of necessity for

 electromechanical energy conversion.
 development of torque.
 commutation.
 generation of voltage.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
For a single phase capacitor start induction motor which of the following is valid?

 Direction of rotation cannot be changed.
 Rotation can be changed by interchanging supply terminals.
 None of these.
  Rotation can be changed by reversing main winding terminals.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In the 3-phase induction motor, the resultant flux is of a constant nature and is

 1/2 times maximum value of flux due to any phase
 equal to φm, where φm is the maximum flux due to any phase
 3/2 times maximum value of flux due to any phase
 3 times maximum value of flux due to any phase

ANSWER DOWNLOAD EXAMIANS APP