Which two variables have an effect on the electrical force between two electrically charged objects like two balloons?

Correct There are four variables rather than two - The amount of charge q₁, the amount of charge q₂, the distance between the spheres and the relative dielectric permeability εr of the medium.

Explanation:

I assume you meant two spherical objects.

The force between two charged objects according to Coulomb's law is calculated by the formula:

Fc =  1/ (4 π ε₀ εr) ·  (q₁ · q₂) / d²

where :

- ε₀ is the dielectric permeability of the vacuum

- εr is the dielectric permeability of the medium

- q₁ the amount of charge of the first sphere

- q₂ the amount of charge of the second sphere

- d is the distance between the spheres

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