DC मोटर का कौन सा भाग मुख्य रूप से कार्बन और ग्रेफाइट संरचना से बना 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?