Final answer:
A wall socket, also referred to as an Outlet, is an example of an AC (alternating current) source of power that many household devices plug into to obtain the power they require.
Step-by-step explanation:
An example of an AC (alternating current) source of power is a wall socket (b) Outlet. Multiple devices such as vacuum cleaners, fans, and hair dryers obtain the power they need when they are plugged into these wall sockets, which are connected to the power grid providing AC potential. This AC potential alternates, pushing charges back and forth in the device's circuit, creating the alternating current that powers the device.
Furthermore, battery packs in electronic devices are often charged using an adapter connected to a wall socket. The adapter's purpose is to convert the AC from the wall socket into the DC required to charge the battery. Nevertheless, it's important to note that a transformer, which is commonly used in power adapters, will not work if provided with a DC voltage since its operation relies on the alternating nature of AC.