The charges on two spheres are +7 C and -5 C respectively. They experience a force F . If each of them is given an additional charge of -2 C , then the new force of attraction will be

Step-by-step solution

aligned & Given, q₁=+7 g C =+7 10⁻⁶ C & q₂=-5 C =-5 10⁻⁶ C aligned New force F^ = ? We know that, F= 1 4 ₀ q₁ q₂ r^2 aligned F & = 1 4 ₀ (+7 10⁻⁶ ) (-5 10⁻⁶ ) r^2 & =- 1 4 ₀ 35 10⁻¹² r^2 ~N F^ & = 1 4 ₀ (+5 10⁻⁶ ) (-7 10⁻⁶ ) r^2 & =- 1 4 ₀ 35 10⁻¹² r^2 ~N & aligned F^ =F