Tóm tắt
\(q_1=q_2=q\)
\(r=2cm=0,02m\)
\(F=1,6.10^{-4}\)
\(\varepsilon=1\)
\(q_1=q_2=q=?\left(C\right)\)
Ta có\(F=9.10^9.\dfrac{\left|q_1.q_2\right|}{\varepsilon.r^2}=9.10^9.\dfrac{q^2}{\varepsilon.r^2}\)
\(\Rightarrow q^2=\dfrac{F.\varepsilon.r^2}{9.10^9}=\dfrac{1,6.10^{-4}.0,02^2}{9.10^9}=7,11.10^{-19}\)