Which one of the following d-c machine losses is determined by applying a standard value rather than by measurement? A. Friction and windage loss B. Core loss C. Copper loss D. Stray-load loss Note: I have doubts if it is the letter B or the letter D, can you help me in this question, thanks.
Which one of the following d-c machine losses is determined by applying a standard value rather than
by measurement?
A. Friction and windage loss
B. Core loss
C. Copper loss
D. Stray-load loss
Note: I have doubts if it is the letter B or the letter D, can you help me in this question, thanks.
DC machine losses -
Mechanical energy is transformed into electrical energy in a DC machine. The complete input power is not converted into output power throughout this operation. Some of the input power is dissipated in various ways.
The nature of this loss may differ from one machine to the next. These losses cause the machine's temperature to increase, reducing the machine's efficiency.
All practical DC machines do not operate at 100% efficiency; there must be some losses in the machine.
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