Which of the following is NOT a method of measuring electrical current?

The correct answer is the voltmeter, as it measures electric potential difference, or voltage, rather than electrical current. A voltmeter is connected in parallel with a circuit component to determine how much voltage is present across that component.

In contrast, an ammeter is specifically designed to measure electric current, requiring a series connection within the circuit to find the current flowing through. A galvanometer, while primarily used to detect and measure small amounts of current, is also a method for measuring current. A multimeter can measure multiple electrical properties, including current, voltage, and resistance, making it a versatile tool for technicians.