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State Variable Analysis on Control Systems related Questions and Answers


Question :   " In case of DC servomotor the back-emf is equivalent to an 'electric friction' which tends to :"
1. " Improve stability of the motor"
2. " Slowly decrease stability of the motor"
3. " Vary rapidly decrease stability of the motor"
4. " Have no effect on stability"
Answer :   1 - " Improve stability of the motor"  

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