Multiplier galvanometer (Schweigger)
Galvanómetro multiplicador (Schweigger)
- Date
- 1820 · confidence high
- Place
- Halle, Saxony-Anhalt, Germany
- Credited to
- Johann Schweigger
- Field
- Matter & energy
What it is
Schweigger surrounded a magnetised needle with many turns of wire, multiplying Ørsted's effect so that weak currents became visible. It was the first sensitive instrument for measuring electric current.
What it led to
- astatic (Nobili) and mirror (Thomson) galvanometers
- quantitative measurements for Ohm's law
- coil ammeters and voltmeters