Abstract
Theoretical study of the electrical activity of the saturated superfluid helium (He II) film upon the relative motion of the normal and superfluid components in the film was performed. The polarization vector due to the dipole moments of the quantized vortex rings in He II in the field of van der Waals forces was calculated taking into account the relative motion of the normal and superfluid components. An explicit analytical expression for the electric potential difference arising upon the relative motion of the normal and superfluid components in a torsional oscillator was derived. The obtained time, temperature and relative velocity dependences of the potential difference were in agreement with the experimental data.
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