Electrical Machines - Electrical Engineering (MCQ) questions and answers for Q. 13962

Q.  If % ηm is the mechanical efficiency of a DC machine and % ηe is the electrical efficiency. Then the overall efficiency of DC machine is given by
- Published on 19 Oct 15

a. % η m + % η e
b. % η m X % η e
c. (% η m + % η e) / % η m
d. (% η m + % η e) / % η e

ANSWER: % η m X % η e

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