Answer:
The electric force gets doubled.
Step-by-step explanation:
According to Coulomb's law the force acting on charged bodies is directly proportional to the product of charges and inversely proportional to the square of distance between them.
Mathematically, it can be written as :

Where
r is the distance between the charges
In this question, it is given that the net charge on one object is doubled. As we can see from Coulomb's law, the electric force (F') gets doubled.
i.e.

F' =2 F
Hence, this is the required solution.