[单选题]
Two positive charges of magnitude 2C anb /r,el7j9 x w4h.rswod 8C rek lvjm ded3,y ev(s.:90(aasp(zzd8h spectively are placed 9cm apart. A third charge is introduced between the two charges as shown beldl3ek.e v(myza(8sh :p( as,9vj 0d zdow;
At what separation, X, from the 2C charge is the electric field strength equal to zero?
