Alternatively known as an
AC/
DC adapter,
AC converter or
charger, an
AC adapter is an external power supply
used with devices that run on batteries or have no other power source.
AC adapters help reduce the size of a laptop computer by alleviating the need for a standard sized power supply.
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A rectifier is an electrical device that converts alternating current (AC), which periodically reverses direction, to direct current (DC), which flows in only one direction. The reverse operation is performed by the inverter. The process is known as rectification, since it "straightens" the direction of current.