I need an intuitive explanation of the mathematical result that there is no force acting in the centre of a dipole. Suppose we put a positive charge in the middle of the dipole, intuitively I think that the charge is attracted by the negative charge and rejected by the positive, so the charge must "fall" on the negative charge. Why in the middle the charge should be in equilibrium? How can the forces be balanced? Where is my mistake?
Sorry for bad english