निम्नलिखित में से कौन सी मोटर एकल-उत्तेजित (singly-excited) मशीन के रूप में कार्य करती है, जिसे केवल एक एसी बिजली स्रोत की आवश्यकता होती 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?