The starting resistance of a D.C. motor is generally_______________?
Correct answer: A. low
- A. low
- B. around 500 Q
- C. 1000 Q
- D. infinitely large
Explanation
The motor's armature resistance is normally very low, so a starting resistor is inserted only to limit the large current produced when back emf is zero. Values such as 500 or 1000 ohms would prevent normal motor starting.
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