Multimeter
device · 1920 · Electric age
Measures voltage, current and resistance.
What it is made of
- Analog-to-digital converter — has part. Digital multimeters.
Principles and materials it uses
- Electrical resistance — uses. Measuring resistance.
- Copper — is made of. The probes and shunts are copper.
- Electromagnetism — uses. Current in a coil deflects the needle.
History: what it evolved from and what it influenced
- Galvanometer — evolved from. Analogue multimeters are a galvanometer with shunts.
- Voltmeter — evolved from. A multimeter combines a voltmeter, an ammeter and an ohmmeter in one case with a selector switch.
- Ammeter — evolved from. The current mode of a multimeter is the same ammeter.