निम्नलिखित में से कौन सा एक स्थिर उपकरण (static device) है जो आवृत्ति को बदले बिना विद्युत शक्ति को एक विद्युत परिपथ से दूसरे विद्युत परिपथ में स्थानांतरित करता 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?