Electrical Machines
In a DC generator, the armature reaction results in

 demagnetization of centers of poles.
  demagnetization of leading & magnetization of trailing pole tip.
 magnetization of leading and demagnetization of trailing pole tip.
  magnetization of inter poles.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In a transformer

 OC test is conducted on HV side and SC test is conducted on LV side
 OC test is conducted on LV side and SC test is conducted on HV side
 both Oc and SC tests are conducted on HV side
 both OC and SC tests are conducted on LV side

ANSWER DOWNLOAD EXAMIANS APP