galvanometer
Noun: A galvanometer is a sensitive instrument used for detecting, measuring, or comparing small electric currents. It typically operates by using the magnetic effect of an electric current to produce a mechanical deflection, often of a needle or a light beam, which is then indicated on a calibrated scale.
The word "galvanometer" is a technical term used primarily in physics and electrical engineering. It functions as a countable noun. * It is used to describe the specific instrument itself. * It is often modified by adjectives specifying its type or sensitivity (e.g., moving-coil galvanometer, sensitive galvanometer).
- The scientist used a galvanometer to detect the tiny current generated by the chemical reaction.
- For this experiment, you will need a very sensitive galvanometer capable of measuring microamperes.
- The deflection of the needle on the galvanometer indicated the presence of an electric current in the circuit.
- Null Method: A galvanometer is often used in a "null" or "balanced" circuit configuration (like in a Wheatstone bridge), where its reading is zero at the point of measurement, indicating no current flow and thus a state of balance.
- Ballistic Galvanometer: A specific type designed to measure the total quantity of electricity (charge) in a brief current pulse, rather than a steady current.
- Galvanometric (adjective): Pertaining to or measured by a galvanometer.
- The galvanometric readings were recorded every minute.
- Galvanometry (noun): The measurement of electric currents with a galvanometer.
- Current meter
- Ammeter (Note: An ammeter is specifically for measuring current magnitude, often derived from a galvanometer with a parallel shunt resistor, while a basic galvanometer can be more general for detection and comparison.)
The word "galvanometer" has a single, specific technical meaning related to electrical measurement. It does not have common idiomatic or figurative uses.
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meter for detecting or comparing or measuring small electric currents
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