Consider an infinite parallel plate capacitor with the lower plate (at z=-d/2) carrying the charge density[tex]- \sigma [/tex] and the upper plate (at z=d/2) carrying the charge density [tex]\sigma[/tex]. Determine all nine elements of the stress tensor in the region between the plates. Display your answer as a 3x3 matrix. [tex]\left(\begin{array}{cc}Txx&Txy&Txz\\Tyx&Tyy&Tyz\\Tzx&Tzy&Tzz\end{array}\right)[/tex] To calculate the matrix I must calculate [tex] Tij = \epsilon(EiEj-0.5\delta ij E^2)+1/\mu (BiBj-0.5\delta ij B^2)[/tex] By calculating the E-field between the plates I get [tex]\sigma / \epsilon\ z[/tex]. My question is how do I calculate the other EiEj and BiBj components. Thank you.