Calculating Electric Flux Through a Rectangle

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Homework Help Overview

The discussion revolves around calculating the electric flux through a rectangular area, specifically a 6m by 4m rectangle, with a normal vector and an electric field vector provided. The original poster expresses uncertainty about their calculations and understanding of the electric flux concept.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • The original poster attempts to apply the formula for electric flux but questions whether their approach is correct, particularly regarding the dot product and area calculation. Some participants affirm the correctness of the original poster's calculation, while others inquire about the reasons for their self-doubt.

Discussion Status

The discussion is ongoing, with some participants providing reassurance about the original poster's calculations. There is a mix of affirmation and exploration of the original poster's concerns, indicating a supportive environment for clarification.

Contextual Notes

The original poster mentions missing a class on electric flux due to personal circumstances, which may contribute to their uncertainty and need for clarification.

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Homework Statement



Determine the electric flux through a 6m by 4m rectangular area. The area is oriented such that a vector normal to its surface points in the [1;6] direction. The electric field is [7;1] N/C.

Homework Equations



Φ=E·A=EA*cosθ

The Attempt at a Solution



[7;1]N/C*[24;144]m2=312 Nm2/C

I did this is wrong, right? How should i go about solving this, doesn't the electric flux equal the dot product of the electric field and the normal vector multiplied area. Am I missing something here?
 
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Why do you think you did it wrong? It looks right to me.
 
Welcome to PH Forums.

Your answer looks right !
 
i always second guess myself, it's a problem I missed the day we learned about EF because of a funeral and I've been playing catch up ever since.
 

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