________________ frequency is not common in low frequency traction system?
Correct answer: A. 40 Hz
- A. 40 Hz
- B. 25 Hz
- C. 16 Hz
- D. non of these
Explanation
Low-frequency railway traction commonly uses 16⅔ Hz or 25 Hz, while 40 Hz is not a standard common frequency for such systems. Hence 40 Hz is the exceptional option.
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