एक DC मोटर में, अधिकतम यांत्रिक शक्ति (maximum mechanical power) तब विकसित होती है जब बैक EMF (विरोधी विद्युत वाहक बल) किसके बराबर 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?