ന്യൂട്രൽ വയറും ഭൂമിയും തമ്മിലുള്ള പൊട്ടൻഷ്യൽ വ്യത്യാസം?
A200വോൾട്ട്
B0 വോൾട്ട്
C110വോൾട്ട്
D240 വോൾട്ട്
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