[单选题]
Two positive charges of magnitude 2C and 8C respectively y,vg bzx )m;irm0g, )zare placed 9cm apays .prgx8(m5i3s(p6 +yubtk q rt. A third charge ikym p bsyi8(+(s 3pxg5u.t rq6s introduced between the two charges as shown below;
At what separation, X, from the 2C charge is the electric field strength equal to zero?
