Answer:
the charge of each particular must be doubled
Step-by-step explanation:
We can solve this exercise using Coulomb's law
F₀ = k q₁ q₂ / r²
tells us that the force is quadrupled and asks if the load
let's call the initial force F₀, let's find the force of the algae they double
q₁ = q₂ = 2q₀
we substitute
F = k 2q₀o 2q₀ / r₁2
F = 4 F₀
we see that for the force to multiply by 4, the charge of each particular must be doubled