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

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

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Electrical Machines
In synchronous generator, inverted V curve is drawn between

 field current on X-axis and power factor on Y-axis
 field current on Y-axis and power factor on X-axis
 field current on X-axis and armature current on Y-axis
 field current on Y-axis and armature current on X-axis

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