Examlex
`Briefly define scarcity, choice, and opportunity cost and explain carefully how they are related and why they are so essential in the study of economics.
Ammeter Function
The function of measuring the current flow in amperes in an electrical circuit, typically done by an ammeter.
Digital Multimeter (DMM)
A multiple mode electrical measurement instrument capable of measuring AC voltage, frequency, DC, ohms, amperage, and other values. The term DMM tends to be used in truck technology; the same instrument is more commonly referred to as a digital volt ohmmeter (DVOM) in the auto area.
Circuit
A closed path through which electrical current flows or can flow.
Cathode
The electrode in a battery or electrochemical cell towards which positive ions move, typically where reduction reactions take place.
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