Which of the following three-phase AC system is used in electric tract – McqOptions

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1.	Which of the following three-phase AC system is used in electric traction?
A.	3 to 3.5 kV at 50 Hz
B.	3 to 3.5 kV at 25 Hz
C.	3 to 3.5 kV at 60 Hz
D.	3 to 3.5 kV at \(16\frac{2}{3}\) Hz
Answer» E.

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