एक डी.सी. मशीन में, वह वाइंडिंग जो चुंबकीय फ्लक्स के प्राथमिक स्रोत के रूप में उपयोग की जाती है, कहलाती है:

In a three-phase alternator, the factor that accounts for the reduction in induced EMF because the coils within a phase group are spread across several slots per pole is known as the ________.

Which factor is least significant in determining the rating of a distribution transformer?