Correct Answer - Option 3 : Two-phase two-wire system
Various systems of power transmission:
The different possible systems of transmission are:
D.C. system:
- D.C. two-wire
- D.C. two-wire with mid-point earthed
- D.C. three-wire
Single-phase A.C. system:
- Single-phase two-wire
- Single-phase two-wire with mid-point earthed
- Single-phase three-wire
Two-phase A.C. system:
- Two-phase four-wire
- Two-phase three wire
Three-phase A.C. system:
- Three-phase three-wire
- Three-phase four-wire
