ASVAB · Electricity Basics

What does an ammeter measure?

Correct answer

Electric current (in amperes)

  1. A Voltage
  2. B Resistance
  3. C Power
  4. D Electric current (in amperes)

Why this is the answer

An AMMETER measures electric CURRENT (in AMPERES/amps). ASVAB Electronics Information tests measuring instruments and units. Key meters: AMMETER → current (amps); VOLTMETER → voltage (volts); OHMMETER → resistance (ohms); a MULTIMETER measures all three. An ammeter is connected in SERIES with the circuit (current flows through it); a voltmeter is connected in PARALLEL (across the component). Knowing that an ammeter measures current (and how it differs from a voltmeter and ohmmeter) is commonly tested.
Source: ASVAB Electronics Information — Measuring Instruments

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About this topic: Electricity Basics

Electricity basics define the quantities everything else depends on: voltage, current, resistance and power, their units, and the difference between AC and DC, conductors and insulators. This is one of 13 Electronics Information questions on electricity basics, each with a full explanation on a single study page.

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