Electric Field: Deriving Equations and Understanding Charge Density

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Homework Help Overview

The discussion revolves around deriving equations for the electric field generated by various charge distributions, including a line of charge, a ring, a semicircle, and a uniform disc. The original poster expresses difficulty in understanding the derivation process and the significance of charge density in these contexts.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • The original poster seeks clarification on the derivation of electric field equations and the role of charge density. Some participants suggest resources that may aid in understanding, while others imply that these examples could guide the calculation process.

Discussion Status

The discussion is ongoing, with participants sharing resources and suggesting that the provided examples may help in understanding the derivation of the electric field equations. There is no explicit consensus yet, as the original poster continues to seek further clarification, particularly regarding the semicircle configuration.

Contextual Notes

The original poster mentions that the teacher's explanations were too fast to follow, indicating a potential gap in foundational understanding that may need to be addressed. Additionally, the absence of specific examples, such as the semicircle, is noted as a constraint in finding comprehensive guidance.

musicfairy
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I need help with the electric field of a line of charge, a ring, semicircle, a line of charge at a point that bisects the line of charge, and a uniform disc. The teacher showed us how to derive those equations but he does it so fast that I didn't have time to copy them down. Even if I did I won't understand why he made certain moves. So can someone please show me how to derive the equations for the electric field and how everything works? I also don't understand the role charge density plays. In each one it comes up.
 
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Thanks. That will go on my favorites list. But it doesn't have a semi circle. Any ideas where I can find that?
 
I think the examples there should suggest ways to calculate it.
 

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