(On request - Nshwah)

Q- Two charges are placed between the plates of a parallel plate capacitor. One charge is +q₁ and the other is q₂ = +6.58 mC. charge per unit are on each plate has a magnitude of σ = 1.39*10^-4 C/m². If the magnitude of force on q₁ due to q₂ is equal to that on q₁ due to the electric field of the capacitor, what is the distance between the two charges?  

Solution: