Electrical Machines
Field winding of a DC series motor is usually provided with thick wire

 in order to reduce eddy current to provide large flux.
 as it carries large load current.
 to provide large flux.
 to reduce the insulation of materials.

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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

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

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