Electrical Machines
Direct-on-line (DOL) starters are not suitable for starting large DC motors, because

 the starting torque becomes low.
 the motor may run away.
 the motor may not start.
 the starting current will be enormously high.

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

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