Question:
A charged particle having a charge of $-2.0 \times 10^{-6} \mathrm{C}$ is placed close to a nonconducting plate having a surface charge density $4.0 \times 10^{-6} \mathrm{C} / \mathrm{m}^{2}$. Find the force of attraction between the particle and the plate.
Solution:
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