The drawing shows two point charges on the x axis. No other charges are nearby. Given that the net electric field E at location P, due to both charges, is 0 N/C, is the sign of the charge q2 positive or negative? Describe.
There are no forces involved in the explanation, therefore using words like "attract" and "repel" is an indication that you're headed the wrong way. too, there are no charges at location P.
q1= +5nC