Electrical Machines
For which of the following loads, armature reaction is magnetizing in nature?

 pure inductive load
 pure capacitive load
 pure resistive load
None of these

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Electrical Machines
If the frequency of input voltage of a transformer is increased keeping the magnitude of voltage unchanged, then

 Pe will increase but Ph will decrease
 Ph will decrease but Pe will remain same
 both hysteresis loss(Ph) and eddy current loss(Pe) will increase
 Ph will increase but Pe will decrease

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