.a.) How do like charges behave toward each other? 7.b.) How do unlike charges behave toward each other?
2 positives repel against each other as well as 2 negatives, but 1 positive & 1 negative attract toward each other.
(a) Like charges repel each other. (b) Unlike charges attract each other.
Two positive charges and tow negative charges are like charges hence they repel each other but if one is positive and other is negative then they are unlike charges and hence attract each other.