The condition for maximum efficiency for a D.C. generator is______________?
Correct answer: D. variable losses = constant losses
- A. eddy current losses = stray losses
- B. hysteresis losses = eddy current losses
- C. copper losses = 0
- D. variable losses = constant losses
Explanation
Maximum efficiency occurs when the variable losses, chiefly armature copper loss, equal the constant losses, such as iron, friction and windage losses. This is the standard load condition for maximum efficiency in a DC generator.
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