Moving Conductor in a Fringing E Field

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SUMMARY

The discussion centers on the behavior of a moving conductor, specifically a metal string, within a fringing electric field generated by an electret material. The string is under mechanical tension and connected to a resistor, creating a circuit. As the string moves toward and away from the electret, the non-uniform electric field produced by the electret influences the string's electrical properties. The consensus is that there will not be a time-varying current in the string due to its motion in the fringing field.

PREREQUISITES
  • Understanding of electric fields and their properties
  • Knowledge of circuit components, including resistors and conductors
  • Familiarity with electret materials and their characteristics
  • Basic principles of mechanics related to tension in strings
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  • Research the properties of fringing electric fields in electrets
  • Study the relationship between mechanical motion and electric current generation
  • Explore the behavior of conductors in non-uniform electric fields
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Physicists, electrical engineers, and students studying electromagnetism and circuit theory will benefit from this discussion, particularly those interested in the interaction between mechanical motion and electric fields.

jamesadrian
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A conductor, like a metal string, is moving in an electric field.

The metal string is under mechanical tension and is electrically connected to a resistor. The other end of the resistor is connected to the remaining end of the string.

The electrical field is the static field of an electret material that is not part of the above circuit. The electret is near the string. The string moves sometimes toward the electret and sometimes away from the electret. The surface of the electret is non-conducting and it is not touching the string or the resistor. The field that the electret produces in not uniform. The intensity of its electric field diminishes with distance away from it. The string is therefore in a static but fringing field.

Will there be a time varying current in the string that corresponds to the movement of the string in the field?

Thank you for your help.

James Adrian
 
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Intuitively, no. Why should there be? [Not a rhetorical question]
PS. My physical intuition is far from infallible.
 

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