Answer:
+2
Explanation:
When in contact, the net charge on the balls will be given by getting the sum of the two charges, considering the signs hence net charge will be+7+-3=+4
Now, with the above net charge, when separation occurs, the charges are divided equally hence :
[tex]\frac{4}{2}=2[/tex]
Therefore, the charge on these balls after coming into contact then separated will be +2 as calculated above.
