For 25 kV single phase system power supply frequency is_______________?
Correct answer: B. 50 Hz
- A. 60 Hz
- B. 50 Hz
- C. 25 Hz
- D. 16 Hz
Explanation
The standard 25 kV railway electrification system uses single-phase AC at 50 Hz, matching the normal power-system frequency used in Pakistan and many other countries.
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