Half of one of the charges is transferred to the other charge and the distance is unchanged. What happens to the force exerted by one charge on the other charge?

3/4F

Explanation:

From the relationship between the force between charges and the distance , we have

it is obvious from newton law that one force cannot exert more force on the other charge hence the two charges must exert the same force on each other.

If half of he force is transferred to the other charge the new charge values become

if we insert this value into the equation, we arrive at

the current is 0.6

voltage ÷ resistance = current

so 12 ÷ 20 = 0.6