🔍 Key Concepts

• Basic DMM functions – what measurements almost every inexpensive handheld meter can do right out of the box • Difference between resistance and reactance (reactance involves AC and phase shift; resistance is DC opposition to current) • Which quantities (voltage, current, resistance, frequency, reactance) require specialized or more advanced meters

💭 Think About

• Think about the three most fundamental electrical quantities you learn first in Ohm’s Law and basic circuits. Which choice lists exactly those three? • Which of the listed quantities normally needs AC test conditions and phase/impedance calculations, not just simple two‑lead measurements? • Look at each option and ask: is this set of measurements typical for the simplest, cheapest DMM you might buy for basic troubleshooting?

✅ Before You Answer

• Verify which quantities are included on the front dial of a basic DMM (common symbols: V, A, Ω). • Check your understanding that reactance (Xc, Xl) is part of impedance in AC circuits, not usually a direct function on a simple DMM. • Confirm that frequency measurement, when present, is a bonus feature on some meters but not part of the most basic “three-function” DMM capability.