अहोरात्र दक्षता (All-day efficiency) की गणना मुख्य रूप से निम्नलिखित में से किस ट्रांसफार्मर के लिए की जाती 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?