Definition

1. Noun:
   • An instrument for measuring electric current: An ammeter is a device used to measure the flow of electrical current in a circuit, with the value displayed in amperes (A).

Usage

• An ammeter is always connected in series with the circuit whose current is being measured. This allows the current to pass directly through the meter.
• It is a fundamental tool in electrical engineering, electronics, and physics for testing, troubleshooting, and monitoring circuits.

Examples

• Noun:
  • The technician used an ammeter to check the current draw of the motor.
  • To measure the current, you must connect the ammeter in series with the load.
  • A digital ammeter provides a more precise reading than an analog one.

Advanced Usage

• "Ammeter shunt": A low-resistance conductor placed in parallel with an ammeter to allow it to measure currents higher than its normal range.
  • A heavy-duty ammeter shunt was installed to measure the high current from the battery bank.

Variants and Related Words

• Galvanometer (n): A sensitive instrument for detecting or measuring small electric currents. Many analog ammeters are based on a galvanometer mechanism.
• Multimeter (n): A versatile electronic measuring instrument that combines several functions, including the ability to measure current (acting as an ammeter), voltage, and resistance.

Synonyms

• Current meter: A general term for a device that measures electrical current flow.

Related Phrases

• "To read the ammeter": To observe and interpret the value shown on the ammeter's display.
  • The operator must read the ammeter to ensure the circuit is not overloaded.
• "Ammeter reading": The specific value of current indicated by the ammeter at a given moment.
  • The steady ammeter reading confirmed the circuit was functioning properly.

Noun

1. a meter that measures the flow of electrical current in amperes