If you double the distance between two objects, the electric force is

a. one half as strong

b. doubled

c. one fourth as strong

d. quadrupled

C. one fourth as strong

Explanation:

Electric force is indirectly proportional to the square of the distance, so if you double the distance, electric force is = 1/2^2 = 1/4

In short, Your Answer would be: Option C

Hope this helps!

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach