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A hollow cylinder of radius r and height h has a total charge q uniformly distributed over its surface. The axis of the cylinder coincides with the z-axis, and the cylinder is centered at the origin, as shown in the figure.What is the electric potential V at the origin?$$ V=\frac{q}{2 \pi \epsilon_{0} h} \ln \left(\frac{2 r}{h}-\sqrt{1+\frac{4 r^{2}}{h^{2}}}\right) $$$$ V=\frac{q}{2 \pi \epsilon_{0} h} \ln \left(\frac{h}{2 r}-\sqrt{1+\frac{h^{2}}{4 r^{2}}}\right) $$$$ V=\frac{q}{2 \pi \epsilon_{0} h} \ln \left(\frac{2 r}{h}+\sqrt{1+\frac{4 r^{2}}{h^{2}}}\right) $$$$ V=\frac{q}{2 \pi \epsilon_{0} h}...
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Three charged particles are located at the corners of an equilateral triangle as shown in the figure below (let $q=1.80 \mu C,$ and $L=0.570 \mathrm{~m})$. Calculate the total electric force on the $7.00-\mu C$ charge.magnitude direction