Which is not true for three-phase AC?
- The three-phase power supply has three distinct wave cycles.
- The voltage of three-phase is 230 V.
- The efficiency of three-phase is high compared to single-phase.
- Three-phase is expensive compared to single-phase.
Answer: All the above are true except (b)
Explanation: The voltage of the single-phase is 230V, whereas three-phase voltage is 415V.