How Does Electric Field Direction Affect Work on a Negative Charge?

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SUMMARY

The discussion centers on the relationship between electric field direction and work done on a negative charge. The correct answer to the posed question is that the potential energy increases as the negative charge moves from a lower to a higher potential, despite initial confusion regarding the direction of the electric field. The key takeaway is the distinction between potential energy and electric potential, which are not synonymous. Understanding this concept is crucial for solving related physics problems accurately.

PREREQUISITES
  • Understanding of electric fields and forces
  • Knowledge of electric potential and potential energy
  • Familiarity with the behavior of negative charges in electric fields
  • Conceptual grasp of work done by electric fields
NEXT STEPS
  • Study the relationship between electric field direction and work done on charges
  • Explore the differences between electric potential and potential energy
  • Learn about the implications of charge movement in varying electric fields
  • Investigate the mathematical formulation of work done in electric fields
USEFUL FOR

Students studying electromagnetism, physics educators, and anyone seeking to deepen their understanding of electric fields and their effects on charged particles.

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1. Homework Statement
question 8.JPG


Hi everyone, I am having trouble solving this question. I know that the right answer is d.

Homework Equations


No equations here, only conceptual stuff.

The Attempt at a Solution



Say I have the following points: A and B

A. B.

The negative charge is moving to the right, and if the electric field does positive work on it, then the electric force is going to the right, which means that the electric field is pointed leftwards from point B to point A.

This means the negative charge is moving from low to high potentials.

I thus would think that the answer is (C), increases, but the right answer apparently is (D) increases.

Could anyone please help me figure out why this is the case?

Thanks in advance for the help, and make it a great day!
 
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Yes, the charge moves from lower to higher potential. But, how do you relate the change in potential energy to the change in potential?
 
To be even more explicit than TSny, potential energy and potential are not the same thing. This problem is a test to see if you know the difference.
 

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