Which term best matches 'a device that measures electric current'?

• A. Volt Meter
• B. Ohm Meter
• C. Amp Meter
• D. Blueprint/Schematic

Answer: (C)

Measuring electric current is done with an ammeter. An ammeter is placed in series with the circuit so all the current flows through it, and it has very low internal resistance to avoid altering the current being measured. It reads in amperes (A). The other options measure different quantities or serve different roles: a voltmeter measures voltage and is connected in parallel, an ohmmeter measures resistance in circuits that aren’t powered, and a blueprint or schematic is a diagram of connections and components rather than a measuring instrument. The term amp meter is a common way to refer to the ammeter, making it the best match for “a device that measures electric current.”