In this video of Why 25 kilovolt is used in railway traction system instead of 240/415 or other HT supply following points have been discussed

Why is electricity transmitted at high voltages?
How does the current in a wire change as the voltage increases?
Why does the Indian railway use a single phase 25 kV overhead line?
Why do Indian railway use 25kv ac instead of 11kv, 440v,220v for OHE?
and many more concepts.

I would really appreciate if you can give me your feedback after watching this video.

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