Question
The excess charge per unit area on a surface is $\sigma=-5.0 \times 10^{-3} \mathrm{C} / \mathrm{m}^{2}$. How many excess electrons are there on a $1.0-\mathrm{mm}^{2}$ piece of the surface?
Step 1
We know that 1 mm² is equal to $1 \times 10^{-6}$ m². Show more…
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