Which device measures current?

Which device measures current?

• A. Voltmeter
• B. Multimeter
• C. Ammeter
• D. Ohmmeter

Answer: (C)

Measuring current means checking how much charge is flowing through a point per second. The tool designed specifically for this is the ammeter. It’s placed in series with the circuit so all the current goes through it, and its own resistance is kept very low to avoid dropping voltage or altering the current. The reading is given in amperes (A) or milliamperes (mA). Voltmeter, by contrast, measures voltage and is connected in parallel across a component, with high internal resistance to minimize current draw. An ohmmeter measures resistance by applying a small current and observing the voltage (used when the circuit is unpowered). A multimeter can measure several quantities, including current, but the instrument dedicated to current measurement is the ammeter, which is why it’s the best answer here.

Measuring current means checking how much charge is flowing through a point per second. The tool designed specifically for this is the ammeter. It’s placed in series with the circuit so all the current goes through it, and its own resistance is kept very low to avoid dropping voltage or altering the current. The reading is given in amperes (A) or milliamperes (mA).

Voltmeter, by contrast, measures voltage and is connected in parallel across a component, with high internal resistance to minimize current draw. An ohmmeter measures resistance by applying a small current and observing the voltage (used when the circuit is unpowered). A multimeter can measure several quantities, including current, but the instrument dedicated to current measurement is the ammeter, which is why it’s the best answer here.