Final answer:
True, a power supply can convert AC to DC and vice versa.
Transformers within chargers convert wall socket AC to device-appropriate DC, while inverters turn DC from solar cells into AC for home use.
Step-by-step explanation:
A power supply is an electrical device that supplies electric power to an electrical load. The main purpose of a power supply is to convert electric current from a source to the correct voltage, current, and frequency to power the load.
For example, small transformers you can plug into a wall socket are used to charge your electronic device, converting the 120 V or 240 V AC supply into the DC voltage suitable for the device.
Moreover, devices such as solar cells provide DC output, which must be converted to AC for most home applications using an inverter.
Devices that require AC to operate, like vacuum cleaners and power tools, obtain their power directly from the wall socket that is connected to the power grid supplying AC.
In cases where high voltage power is sent over long distances, transformers are used to step down the voltage to a safer level for consumption by the user. These transformers are integral components in managing the delivery and usage of electrical power.