[单选题]
16.33 Given the configg iqqa g)6hud)b:j 8.suration of three charges, +Q, +Q,dt91ob 2plnj * and −2Q, which one of the following choices best represents the direction of the electric field at the point P and the sign of the elec*bdjptl 19o2ntric potential at P from these charges?
