Final answer:
To test an AC outlet, the correct tool to use is an outlet tester. Voltmeters and ammeters are used for measuring voltage and current in circuits, respectively, but are not used for direct testing of outlets.
Step-by-step explanation:
A outlet tester is used to test AC outlets. While voltmeters, ammeters, and oscilloscopes have their specific uses in an electrical circuit, an outlet tester is designed specifically to check AC outlets for proper wiring and other electrical parameters.
A voltmeter is connected in parallel in a circuit to measure the potential difference (voltage) between two points, and it does not alter the current flow in the circuit. An ammeter is connected in series to measure the current flowing through a particular section of the circuit. Although these instruments are essential for diagnosing electrical issues, they are not typically used for the direct testing of AC outlets.
For safety and assurance that the AC outlets in a home or building are correctly wired and functioning, a dedicated outlet tester is the appropriate tool. An outlet tester can indicate whether the hot, neutral, and ground wires are correctly connected and if there are any potential wiring faults.