For which of the following applications a D.C. motor is preferred over an A.C. motor ?
Correct answer: C. Variable speed operation
- A. Low speed operation
- B. High speed operation
- C. Variable speed operation
- D. Fixed speed operation
Explanation
D.C. motors are especially preferred where continuously variable speed is needed because their armature voltage and field flux can be controlled independently. A.C. motors are generally preferred for fixed-speed industrial drives.
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