a. F = [tex] \frac{q1q2}{ 4π\ epsilon_{0}r^{2} } [/tex]
r = [tex]\sqrt{ \frac{q1q2}{4π \epsilon_{0 }F}[/tex]
q1 = 6 μC = [tex]6 * 10^{-9}[/tex] C
q2 = 5 μC = [tex]9 * 10^{-9}[/tex] C
r =[tex]\sqrt{\frac{6*9* 10^{-18}}{12} }*\frac{1}{111.156*10^{-12}}[/tex]
r = [tex]2.12*10^{-9} : 111.156 * 10^{-12}[/tex]
r = [tex]0.01 * 10^{3} [/tex]m
b. E = [tex]\frac{F}{q1} [/tex]
E =[tex]\frac{q2}{4πepsilon_{0} * r^{2}}[/tex]
E = [tex]5*10 ^{-9} : (0.01 * 10^{-6})[/tex]
E = [tex]500*10^{-3}
[/tex]E = 0.5 N/C
