Electric Physics: Electric Fields, Flux & Potentials

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Electric fields, flux, and electric potentials are key topics in physics that can be explored in the general physics section of the forum. For specific homework questions related to these subjects, users are advised to post in the homework section for targeted assistance. Engaging with the community can provide valuable insights and help clarify complex concepts. New members are encouraged to ask questions to enhance their understanding. Utilizing the appropriate sections will facilitate better responses and support.
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Electric fields, flux and electric potentials.

Hello forum community! I am new and I was just wondering which forum would be best for me to find help on the subjects mentioned above?
 
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Just ask your question here in the appropriate section. For those topics, the general physics section would be the best. But if its a homework problem, put it in the home work section.
 
thanks! Will do
 

Thread 'Maxwell stress tensor'

This is from Griffiths' Electrodynamics, 3rd edition, page 352. I am trying to calculate the divergence of the Maxwell stress tensor. The tensor is given as ##T_{ij} =\epsilon_0 (E_iE_j-\frac 1 2 \delta_{ij} E^2)+\frac 1 {\mu_0}(B_iB_j-\frac 1 2 \delta_{ij} B^2)##. To make things easier, I just want to focus on the part with the electrical field, i.e. I want to find the divergence of ##E_{ij}=E_iE_j-\frac 1 2 \delta_{ij}E^2##. In matrix form, this tensor should look like this...
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Thread 'Applying the Gauss (1835) formula for force between 2 parallel DC currents'

Thread 'Applying the Gauss (1835) formula for force between 2 parallel DC currents'

Please can anyone either:- (1) point me to a derivation of the perpendicular force (Fy) between two very long parallel wires carrying steady currents utilising the formula of Gauss for the force F along the line r between 2 charges? Or alternatively (2) point out where I have gone wrong in my method? I am having problems with calculating the direction and magnitude of the force as expected from modern (Biot-Savart-Maxwell-Lorentz) formula. Here is my method and results so far:- This...
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