Electrical Engineering · DC Motors
Which of the following formulas correctly expresses the armature current at maximum efficiency in a DC motor?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Constant loss × √Full load current / Full load copper loss
- 2Full load current × √Full load copper loss / Constant loss
- 3Full load copper loss × √Constant loss / Full load current
- 4Full load current × √Constant loss / Full load copper loss✓
Correct answer
Full load current × √Constant loss / Full load copper loss
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