[单选题]
Two positive charges ofw* szf.6i1ga ol bgf :oan8t() magnitude 2C and 8C respectively are placed 9cm a i h2cuzhi46uj3eo.z3 2;t *t osme+tppart. A third charge is introduced between +o6 3.iutizut4*eomh;t p2c 3 je 2shzthe two charges as shown below;
At what separation, X, from the 2C charge is the electric field strength equal to zero?