Electrical Machines
Two DC series motors are connected in series and are driving the same mechanical load. If the motors are now connected in parallel the speed will become

 4 times.
 half.
 double.
 one fourth.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The mmf produced by rotor currents of a 3 - Φ induction motor

  rotates at synchronous speed with respect to rotor.
  rotates at slip speed with respect to stator mmf.
  rotates at the speed of rotor in the air gap.
  is at standstill with respect to stator mmf.

ANSWER DOWNLOAD EXAMIANS APP