Which tool is used to measure electrical parameters such as voltage, resistance, and current?

• A. Wrench
• B. Screwdriver
• C. Multimeter
• D. Oscilloscope

Answer: (C)

You need a tool that can read volts, ohms, and amps. A digital multimeter is designed for that exact job. It has settings to measure voltage (DC and AC), resistance in ohms, and current in amperes, making it the go-to instrument for automotive electrical checks such as battery voltage, sensor resistance, and current draw. Wrenches and screwdrivers don’t measure electrical values; they’re for fastening. An oscilloscope can display voltage waveforms and can measure some parameters with probes, but it’s a more specialized instrument and isn’t the simplest way to directly read resistance or the current in a circuit. So the multimeter is the best choice for measuring these electrical parameters. When using it, select the correct function and range, connect the test leads appropriately, and remember to de-energize the circuit before measuring resistance.