🔭 Scientific instrument

Electrophorus

Electróforo

Date
1775 · confidence high
Place
Como, Lombardy, Italy
Credited to
Alessandro Volta (preceded by Johan Carl Wilcke)
Field
Matter & energy

⚠️ Disputed: the sources disagree.

What it is

A resin plate charged by rubbing, on which a metal disc rests: by induction charges can be drawn off over and over. It was the first electrostatic generator by influence and the instrument that led Volta to the pile.

The Swede Johan Carl Wilcke built a device on a similar principle in 1762; Volta developed it and named it in 1775.

What it led to

  • electrostatic influence machines (Toepler-Holtz, Wimshurst)
  • Volta's condenser and electroscope
  • Volta's work leading to the voltaic pile
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Sources✓ verified 2026-11-04