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In case of DC servomotor the back-emf is equivalent to an “electric friction” which tends to :
  • a)
    Improve stability of the motor
  • b)
    Slowly decrease stability of the motor
  • c)
    Vary rapidly decrease stability of the motor
  • d)
    Have no effect on stability
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
In case of DC servomotor the back-emf is equivalent to an “elect...
Answer: a
Explanation: Back emf is the voltage that is generated in absence of the input and in case of DC servomotor tends to improve the stability of the motor.
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Most Upvoted Answer
In case of DC servomotor the back-emf is equivalent to an “elect...
Opposing voltage generated by the rotation of the motor's armature. This back-emf is proportional to the speed of the motor and is generated due to the interaction between the armature windings and the magnetic field produced by the permanent magnets or field windings in the motor.
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In case of DC servomotor the back-emf is equivalent to an “electric friction” which tends to :a)Improve stability of the motorb)Slowly decrease stability of the motorc)Vary rapidly decrease stability of the motord)Have no effect on stabilityCorrect answer is option 'A'. Can you explain this answer?
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