Electrical Machines
In a DC compound motor the field regulator is provided to

 limit the armature current.
 demagnetize the field partially.
 control the field flux.
 control the armature flux.

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Electrical Machines
Consider the following statements : Interpoles in dc machines 1. reducearmature reaction effects in the interpolar region 2. have the same dimension as main polls 3. have their windings connected in series with the armature 4. have same number of turns as the armature 5. have the polarity same as that of the main pole ahead in a motor From these, the correct statements are

 1, 2 and 3
 1, 3 and 5
 1, 2, 3 and 5
 1 and 3

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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 LV side
 both Oc and SC tests are conducted on HV side

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