A 20-pole alternator is having 180 identical stator slots with 6 conductors in each slot. All the coils of a phase are in series. If the coils are connected to realize single-phase winding, the generator voltage is V1. If the coils are reconnected to realize three-phase star-connected winding, the generated phase voltage is V2. Assuming full pitch, single-layer winding, the ratio V1/V2 is

• A. \(\frac{1}{{\sqrt 3 }}\)
• B. \(\frac{1}{2}\)
• C. \(\sqrt 3 \)
• D. 2