and q2 are placed on a straight line with q1 at x=a and q2 at 2a the net force on anotherbcharge at the origin is zero if q2=kq1 where k is equal to?…

charge q1 and q2 are placed on a straight line with q1 at x=a and q2 at 2a the net force on anotherbcharge at the origin is zero if q2=kq1 where k is equal to?.