Which formula matches the form of Coulomb's law given in the notes for two charges $q_1$ and $q_2$ separated by distance $r$?
A$F = k\dfrac{q_1 q_2}{r^2}$
B$F = k\dfrac{q_1 + q_2}{r}$
C$F = k q_1 q_2 r^2$
D$F = k\dfrac{r^2}{q_1 q_2}$
Answer & Solution
Correct answer: A. $F = k\dfrac{q_1 q_2}{r^2}$
The law is written as $F = k\dfrac{q_1 q_2}{r^2}$. This includes direct proportionality to the product of charges and inverse-square dependence on distance.
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