142 TREATISE ON ALTERNATING CURRENTS. 



2. A synchronous motor is capable of giving 30 kilowatts without falling out 

 of step when running on a 200-volt 50-frequency circuit, and its counter E.M.F. 

 is then 1 500 volts. What is the resistance and self-induction of its armature ? 

 and what is the current corresponding to its maximum output ? 



Answer. Armature resistance = 0*333 ohm ; armature self-induction = O'OIG 

 henry, nearly ; current = 300 amperes. 



