  We report an experimental investigation of the electric response of
superfluid helium. Our results confirm the presence of electric potential that
appears at the relative oscillatory motion of normal fluid and superfluid
components in helium generated by the heater. The resonance of the electric
potential was observed in the first four harmonics. A suggested method for the
detection of the electric response allows the required resonance peak to be
distinguished from spurious signals. Our results are in qualitative agreement
with the data published by previous researchers. The reasons for the
discrepancy in the measured values of the potential difference are discussed.
