engineering recuitment UPPCL Technician Electrician 2022 Mock Test Electrical Machines DC Motor

d.c. मोटर के मामले में पश्च e.m.f और लागू वोल्टेज के बीच क्या संबंध होता है?

1
Eb = V + IaRa
2
Eb = V - IaRa
3
Eb = V
4
इनमें से कोई नहीं
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