Electric potential energy formula deltaPE=-qE(deltaX)

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The formula deltaPE=-qE(deltaX) indicates that when a charge moves in the direction of the electric field, its potential energy decreases, resulting in a negative change in potential energy. Specifically, if the electric field points to the right and a positive charge also moves to the right, the field does work on the charge, reducing its potential energy. This negative change in potential energy reflects energy conservation principles. The discussion clarifies that assuming a positive charge simplifies the analysis of the formula. Overall, the interaction between the electric field and the charge leads to a decrease in potential energy as the charge moves in the field's direction.
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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