Electrical Machines
In a synchronous generator with constant steam input supplies power to an infinite bus at a lagging power factor. If the excitation is increased

 both power angle and power factor increase
 power angle increase and power factor decrease
 power angle decrease and power factor increase
 both power angle and power factor decrease

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Electrical Machines
In a transformer

 both OC and SC tests are conducted on LV side
 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

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