Electric potential energy formula deltaPE=-qE(deltaX)

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Discussion Overview

The discussion revolves around the formula for electric potential energy, specifically the interpretation of the negative sign in the equation deltaPE=-qE(deltaX). Participants explore the implications of this formula in the context of electric fields and charge movement.

Discussion Character

  • Conceptual clarification, Technical explanation

Main Points Raised

  • One participant questions the meaning of the negative sign in the formula deltaPE=-qE(deltaX).
  • Another participant explains that if the electric field points to the right and the charge moves to the right, the field provides energy to the charge, resulting in a decrease in potential energy, hence a negative delta PE.
  • A participant seeks clarification on whether the potential energy decreases as the charge moves from left to right and asks about the nature of the charge (positive or negative).
  • One participant assumes a positive charge to simplify the discussion and confirms that the potential energy decreases when a positive charge moves in the direction of the electric field.
  • A later reply indicates that the explanation provided has led to a better understanding of the concept.

Areas of Agreement / Disagreement

Participants generally agree on the interpretation of the negative sign in the context of a positive charge moving in the direction of the electric field, but the discussion does not explore alternative interpretations or scenarios in detail.

Contextual Notes

The discussion does not address potential variations in interpretation based on different charge types or configurations of electric fields.

Who May Find This Useful

Individuals interested in understanding electric potential energy, particularly students or learners in physics and electrical engineering contexts.

Mohd Taqi
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About the formula deltaPE=-qE(deltaX) .. Whats the negative sign means ?
 
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If the E field points to the right and the charge moves to the right, the field is providing energy to the charge. To conserve energy, this means that less potential energy remains. So the delta PE is negative.
 
So do you mean as the charge moves from left to the right its PE is decreasing ? Btw, the charge is positive or negative ?
 
I was assuming a positive charge. That keeps the number of negations we have to worry about to a minimum.

Yes, if the E field points rightward and a positive charge moves rightward, the potential energy of that charge is reduced.
 
Oh okay .. I finally understand it. Thank you ..
 

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