The system of electrohydrodynamics equations consists of two blocks:equations of electrochemistry of liquid dielectrics, describing passage of electrical current in a liquid with the ionic mechanism of conductivity at absence of interaction of ions with a liquid and of hydrodynamics equations, describing movement of charged liquid in electrical field. As a rule, it is necessary, that the electrical force is enclosed in the whole liquid. In liquid dielectrics the relation neutral and charged component is equal 10⁶-10¹⁰ therefore there is the question about validity of this rule for a liquid, consisting mainly of neutral molecules. In work on electrohydrodynamics the mechanism of transfer of a pulse from charged components to neutral considered friction of ions about a liquid. However, this mechanism does not explain how one ion entrains together with self 10¹⁰ and more neutral molecules. Study of electrohydrodynamic currents has shown, that the speed of currents much exceeds speed of ionic drift, and the ion does not move concerning environmental molecules and he can be considered `frozen' in liquid.