Which of the following methods is used to control speed of 25 kV, 50 – McqOptions

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1.	Which of the following methods is used to control speed of 25 kV, 50 Hz single phase traction?
A.	Reduced current method
B.	Tap changing control of transformer
C.	Series parallel operation of motors
D.	All of the above
Answer» C. Series parallel operation of motors

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