रोथर्ट की MMF विधि का उपयोग निम्नलिखित में से किस विद्युत उपकरण के वोल्टेज रेगुलेशन को ज्ञात करने के लिए किया जाता 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?