electrometer
nounUK /ɪˌlɛkˈtrɒmɪtə/
US /ɪˌlɛkˈtrɑːmɪtər/
A tool that measures tiny amounts of electricity.
The scientist used an electrometer to check the small charge on the balloon.
RELATED WORDS
OTHER MEANINGS
2. A highly sensitive instrument for detecting and measuring electric charge or potential difference, often used in physics experiments.
The electrometer's needle barely moved when the charged rod was brought near.
3. A device used in radiation dosimetry to measure ionizing radiation by the charge it produces.
The technician read the electrometer to determine the radiation dose.
4. An early electrostatic instrument, such as a gold-leaf electroscope, used to indicate the presence of electric charge.
In the 1800s, an electrometer was a common classroom demonstration tool.