Which tool is commonly used to check the continuity of electrical circuits?

The multimeter is widely used to check the continuity of electrical circuits because it is capable of measuring resistance, voltage, and current. When checking for continuity, a multimeter can be set to the resistance (ohm) setting. If there is a complete path for current to flow, the multimeter will display a reading of zero ohms or, in some models, emit a sound to indicate continuity, making it a practical tool for troubleshooting electrical issues.

Other tools listed may serve different functions; for example, an oscilloscope measures varying electrical signals rather than the continuity of a circuit. A clamp meter is designed to measure current flowing through a wire without having to disconnect it from the circuit. An infrared thermometer is used for measuring surface temperatures and has no relevance to electrical continuity. Thus, the multimeter's versatility and specific capabilities make it the appropriate choice for checking continuity.