Answer: 5.184 N
Explanation:
Given
The charge on the balloon is [tex]q_1=-6\times 10^{-6}\ C[/tex]
distance between balloon and jeans is [tex]r=0.25\ m[/tex]
After rubbing jeans must acquire the same opposite charge i.e.
[tex]q_2=6\times 10^{-6}\ C[/tex]
The electrostatic force between them
[tex]\Rightarrow F=\dfrac{kq_1q_2}{r^2}\\\\\Rightarrow F=\dfrac{9\times 10^9\times 6\times 10^{-6}\times 6\times 10^{-6}}{0.25^2}\\\\ \Rightarrow F=4\times 4\times 9\times 36\times 10^{-3}=5.184\ N[/tex]
nature of force will be attractive i.e. Jeans will try to pull the balloon
