If the field winding resistance of a DC shunt motor is increases, its speed will____________?
Correct answer: C. increases
- A. If the field winding resistance of a DC shunt motor is increases, its speed will
- B. decreases
- C. increases
- D. remains same
- E. none of the above
Explanation
Increasing the shunt-field resistance reduces field current and therefore weakens the flux. Since motor speed is approximately inversely proportional to flux, the speed increases.
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