Two Point Charges, Q₁ and Q₂, Are Separated by a Distance

Multiple Choice

Two point charges, Q₁ and Q₂, are separated by a distance R. If the magnitudes of both charges are doubled and their separation is also doubled, what happens to the electrical force that each charge exerts on the other one?

A) It increases by a factor of 2.
B) It increases by a factor of $\sqrt { 2 }$ .
C) It is reduced by a factor of $\sqrt { 2 }$ .
D) It increases by a factor of 4.
E) It remains the same.