Zeta potential is the electric potential at the slipping plane grain boundary the Stern layer All of them the Diffuse layer
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The zeta potential is the electric potential at the slipping plane, which is the boundary between the Stern layer and the Diffuse layer. Show more…
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The potential can be calculated by superposition. Choose the plane of the upper ring as $x=l / 2$ and that of the lower ring as $x=-l / 2$ For $\quad|x|>>R, \varphi \sim \frac{q l}{4 \pi x^{2}}$ The electric field is $E=-\frac{\partial \varphi}{\partial x}$ $$ =-\frac{q l}{4 \pi \varepsilon_{0}\left(R^{2}+x^{2}\right)^{3 / 2}}+\frac{3}{2} \frac{q l}{\left(R^{2}+x^{2}\right)^{5 / 2} 4 \pi \varepsilon_{0}} \times 2 x=\frac{q l\left(2 x^{2}-R^{2}\right)}{4 \pi \varepsilon_{0}\left(R^{2}+x^{2}\right)^{5 / 2}} $$ For $\quad|x|>>R, E \sim \frac{q l}{2 \pi \varepsilon-r^{3}} . \quad$ The plot is as given in the book.
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