How can you check a light bulb for continuity?

Using a multimeter set to continuity mode is an effective method to check a light bulb for continuity. When in continuity mode, the multimeter sends a small electrical current through the circuit, including the light bulb. If the bulb's filament is intact, it will allow this current to pass, which will cause the multimeter to beep or show a low resistance value. This means that there is a complete path for the current to flow, indicating that the bulb is functional.

This approach is reliable since it directly tests the electrical continuity of the bulb's internal components, ensuring that they are not open or damaged. It is generally more conclusive than visual inspections or measuring voltage, as those methods may not accurately reveal whether the filament is intact or if there is an internal break in the bulb.

Using resistance mode could provide useful information about the bulb’s integrity, but it doesn’t confirm that the light bulb can function properly in a circuit while under operational conditions. Thus, continuity mode is the best choice for determining if the light bulb can conduct electricity effectively.