Potential with an edge

A thin disc of radius R=10 cm \displaystyle R = 10 \text{ cm } made of non-conducting material is charged uniformly so as to acquire a uniform surface charge density σ=5 nC/m2\displaystyle \sigma = 5 \text{ nC}/\text{m}^2 .

Find the potential at the edge of the disc in Volts.

Details and Assumptions

  • 14πϵ0=9×109 Nm2/C2\displaystyle \frac{1}{4 \pi \epsilon _{0} } = 9 \times 10^{9} \text{ N}\cdot \text{m}^2 / \text{C}^2
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