ammeter
IPA/ˈæmiːtə(r)/
KK[ˈæmˌitɚ]IPA/ˈæmiːtər/
ammeter — noun
- ammetersingular
- ammetersplural
1. a piece of equipment that shows how much electrical current is passing through a
1.名詞B2
釋義
a piece of equipment that shows how much electrical current is passing through a wire or circuit, with the result given in amps or amperes.
例句
Bilal watched the needle on the ammeter as he slowly turned up the power dial.
ammeter + needle: analog display reading
The physics teacher connected the ammeter in series so current would flow through it.
connected in series — correct wiring for an ammeter
Nala checked the ammeter reading before adding a second battery to the circuit.
An ammeter shows whether a device is drawing too much current.
同義詞
- current meter
less common; can also refer to water-flow meters in non-electrical contexts
反義詞
- voltmeter
measures voltage (electric potential difference) instead of current
常見錯誤
❌I measured the voltage with an ammeter.
✅I measured the current with an ammeter.
💡An ammeter measures current (flow of electrons), not voltage (electric pressure). Use a voltmeter for voltage.
❌She connected the ammeter across the battery terminals.
✅She connected the ammeter in series with the battery.
💡An ammeter must be wired in series (in the path of the current), not in parallel across terminals, or it may be damaged.