What are the typical functions of a digital multimeter?

• A. Measure voltage (AC/DC), current, resistance, and continuity; sometimes frequency.
• B. Only measure resistance.
• C. Measure temperature and humidity.
• D. Block the circuit to protect from surges.

Answer: (B)

A digital multimeter is a versatile tool for checking basic electrical quantities. The typical functions you’ll rely on are measuring voltage in both AC and DC (to see how much potential difference exists across a component or supply), measuring current (to know how much current is flowing through a circuit, usually inserted in series), measuring resistance (to determine how much a component resists current when the circuit is powered down), and testing continuity (to quickly verify that there is a complete path in a circuit, often with an audible beep). Some meters also include frequency measurement, which is useful for signals, and many have additional options like capacitance, diode test, or temperature on more advanced models. The other options describe capabilities that aren’t the typical, core functions of a DMM—temperature/humidity readings aren’t electrical measurements, and “blocking the circuit” isn’t what a multimeter does; it’s used for measurement, not surge protection.