2023 · Q65
The r.m.s. potential difference between the red live wire and black neutral wire in Indian domestic electric supply is
General KnowledgePhysics
- A160 V
- B220 V
- C300 V
- D410 V
Explanation
The Indian domestic AC supply is rated 230 V (nominal, historically 220 V) at 50 Hz, measured as the root-mean-square potential difference between the red (live/phase) wire and the black (neutral) wire. The peak voltage is about 311 V, but the r.m.s. value quoted for supply purposes is 220 V.