Which of the following measurements are commonly made using a multimeter?

A multimeter is a versatile instrument commonly used in electronics and radio communications for measuring various electrical properties. Voltage and resistance are two fundamental measurements that a multimeter is specifically designed to perform.

When measuring voltage, the multimeter can be set to different modes to read both DC (direct current) and AC (alternating current) voltages, allowing users to check power supplies, battery charges, and circuit conditions.

When measuring resistance, the multimeter takes a reading of how much opposition the current encounters as it flows through a component, which is essential for troubleshooting circuits and understanding how components like resistors are functioning.

In contrast, while the other options mention important measurements in the context of radio and electronics, they are typically not performed using a standard multimeter. SWR (Standing Wave Ratio) and RF power are specialized measurements that often require different types of equipment, such as an SWR meter or a wattmeter. Signal strength and noise are often analyzed using instruments like spectrum analyzers or radio receivers rather than a multimeter. Impedance and reactance measurements usually require more advanced equipment, such as an LCR meter or an impedance analyzer.

Thus, the most fundamental measurements that align with the capabilities of a multimeter are indeed voltage