For which of the following applications D.C. motors are still preferred ?
Correct answer: C. Variable speed drive
- A. High efficiency operation
- B. Reversibility
- C. Variable speed drive
- D. High starting torque
Explanation
DC motors remain especially useful where a wide and precise range of speed control is required, because their speed can be controlled conveniently through armature voltage or field flux. High starting torque is a characteristic, not an application category.
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