Hi all,

 

Does a magnetic field cause any changes in the electric polarity of a polar molecule like water, Depending on the local generated electric field due to thermal motion of molecules ?

 

It may not be observed in bulk state due to the randomness of thermal motion and so the variation of velocity will cancel out the effect, but I assume that the molecular interaction energy within the same fluid or with other molecules would change, locally at least.

Since atoms in one molecule are not moving with respect to each other, then magnetic field will not affect the internal structure of the molecule.

 

But, since the whole molecule is vibrating, then the magnetic field will make the polarized molecule to rotate, but, will not increase, nor decrease its velocity (because magnetic force is always perpendicular to velocity).