Electrical Machines
If the armature electric current is increased to double its previous value, and the time of commutation is halved, how will the reactance voltage vary?

 It will remain the same.
  It will be halved.
  It will becomes four times.
  It will be doubled.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Cogging in induction motor occurs when

 number of stator teeth - number of rotor teeth = 0.
 number of stator teeth - number of rotor teeth = even number.
 number of stator teeth - number of rotor teeth = negative number.
 number of stator teeth - number of rotor teeth = odd number.

ANSWER DOWNLOAD EXAMIANS APP