Oklahoma Locksmith Practice Exam

What does a digital multimeter measure?

1. Only voltage

2. Only current

3. Voltage, current, and resistance

4. Only resistance

The correct answer is: Voltage, current, and resistance

A digital multimeter is a versatile instrument that is designed to measure multiple electrical properties, making it an essential tool in various fields like electronics, automotive, and electrical troubleshooting. This device can measure voltage, current, and resistance, which are the three fundamental electrical measurements. When measuring voltage, the multimeter can show the potential difference between two points in a circuit, whether in AC or DC. For current, it can measure how much electric charge flows past a given point in a circuit per unit time, again capable of handling both AC and DC. Additionally, it measures resistance, which quantifies the opposition to the flow of current in a circuit. This capability to perform all three measurements—voltage, current, and resistance—simultaneously makes the digital multimeter a comprehensive tool that goes beyond measuring just one aspect of electrical circuits. Thus, the answer indicates the full range of functions that a digital multimeter can perform, highlighting its utility and versatility in electrical diagnostics.