In a differentially compounded D.C. motor, if shunt field suddenly opens____________?
Correct answer: A. the motor will first stop and then run in opposite direction as series motor
- A. the motor will first stop and then run in opposite direction as series motor
- B. the motor will work as series motor and run at slow speed in the same direction
- C. the motor will work as series motor and run at high speed in the same direction
- D. the motor will not work and come to stop
Explanation
Opening the shunt field removes the main flux, leaving the series field whose flux is opposite to the original shunt-field flux in a differentially compounded motor. The motor therefore stops momentarily and then tends to run in the opposite direction as a series motor.
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