As an experimental teaching material to show the polarity of molecule, the phenomenon that the liquid flow is bent by a charged body is sometimes used. As a result of investigating this phenomenon for various liquids, it was confirmed that there is a correlation between the polarity of the molecule and the bending angle, but the charging of the liquid was also observed for the liquid showing a large bending angle. This result suggests that the cause of this phenomenon is electrostatic induction rather than dielectric polarization. Therefore, it is inappropriate to use this phenomenon as a teaching material showing the polarity of molecule.
