Electrical Machines
Two identical loss less series motors connected in series across a dc supply voltage, runs at speed of N1 and N2, then ratio of their output power is

 N1 : N2.
 1 : 1.
 N12 : N22.
 none.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In a loaded DC generator, if the brushes are given a shift from the interpolar axis in the direction of rotation, then the commutation will

 improve with fall of terminal voltage.
 deteriorate with rise in terminal voltage.
 improve with rise in terminal voltage.
 deteriorate with fall of terminal voltage.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In an alternator, voltage drops occurs in

  armature resistance, leakage reactance and armature reaction.
  armature resistance only.
  armature resistance, leakage reactance, armature reaction and earth connection.
  armature resistance and leakage reactance.

ANSWER DOWNLOAD EXAMIANS APP