Potential and field at two electric plates

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Homework Help Overview

The discussion revolves around the concepts of electric potential and electric fields in the context of two charged plates. Participants are examining the relationships between potential differences and the work done on test charges within an electric field.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants explore the reasoning behind the work done to move a charge in an electric field and question the relevance of certain formulas related to electric potential.

Discussion Status

Some participants have provided explanations and confirmations regarding the correctness of certain answers, while others are questioning the validity of alternative responses. The discussion appears to be engaging with multiple interpretations of the concepts involved.

Contextual Notes

There is a mention of potential being zero at a midpoint between the plates, which may indicate assumptions about the configuration of the electric field and the nature of the charges on the plates.

kirby2
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Yes on both A and C. My explanation for A would be that work needs to be done to push a positive test charge from B to A against the force of the electric field. Your V=kq/r is obscure (unrelated to this question) because it is the absolute potential or work/charge for moving a charge from infinite distance into a position that is distance r away from charge q. It does tell you that the potential midway between the positive and negative plates is zero, though.
 
and the other answers are wrong, correct?
 
Correct.
 

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