Ammeters

Definition

Ammeters are instruments used to measure electric current in a circuit. They are connected in series with the component whose current is to be measured.

5 Must Know Facts For Your Next Test

1. Ammeters must have very low internal resistance to minimize their impact on the circuit.
2. They are always connected in series with the circuit element under test to measure the current accurately.
3. The unit of measurement for current is the ampere (A).
4. If an ammeter is connected incorrectly, it can cause a significant voltage drop or even damage the instrument.
5. Analog ammeters use a moving-coil mechanism, whereas digital ammeters use analog-to-digital converters to display current readings.

Review Questions

Related terms

Voltmeter:

An instrument used for measuring the electrical potential difference between two points in an electric circuit.

Series Connection: A type of electrical connection where components are connected end-to-end so that there is only one path for current flow.

Current:

$I$ The flow of electric charge through a conductor, typically measured in amperes (A).