एक DC जनरेटर में, संचालन के दौरान ब्रुशों पर अत्यधिक स्पार्किंग होने का मुख्य कारण क्या होता 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?