What tool is commonly used to check the resistance of a circuit?

The multimeter is the appropriate tool for checking the resistance of a circuit because it is specifically designed to measure electrical parameters such as voltage, current, and resistance. When measuring resistance, the multimeter applies a small voltage to the component being tested and measures the current that flows through it. Ohm's law is then applied to calculate the resistance, providing accurate readings essential for assessing the functionality of electrical components and circuits.

Other tools mentioned, such as the oscilloscope, clamp meter, and voltage tester, serve different functions. An oscilloscope is primarily used for visualizing and analyzing the waveform of electrical signals. A clamp meter is designed for measuring current without disconnecting the circuit and is not suitable for direct resistance measurements. A voltage tester checks for the presence of voltage but does not provide information about resistance levels. This makes the multimeter the most versatile and comprehensive tool for conducting resistance measurements in electrical systems.