A hollow sphere of radius $0.1\,\text{m}$ has a charge of $5\times10^{-8}\,\text{C}$. The potential at a distance of $5\,\text{cm}$ from the centre of the sphere is: $\left(\frac{1}{4\pi\varepsilon_0}=9\times10^9\,\text{N m}^2/\text{C}^2\right)$
- A$4000\,\text{V}$
- B$4500\,\text{V}$
- C$5000\,\text{V}$
- D$6000\,\text{V}$
✓ Correct answer: B
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