📊 Control of Electric Drives
Q. Long distance railways use which of the following ?
  • (A) 200 V D.C.
  • (B) 25 kV single phase A.
  • (C) 25 kV two phase A.C.
  • (D) 25 kV three phase A.C.
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✅ Correct Answer: (B) 25 kV single phase A.

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