Correct Answer: Rectifier

Solution : The correct option is rectifier.

The device employed for transforming alternating current (AC) into direct current (DC) is known as a rectifier. Various types of rectifiers exist, including diode rectifiers, bridge rectifiers, as well as more sophisticated semiconductor-based rectifiers like thyristors and silicon-controlled rectifiers (SCRs). These components are essential in a wide array of electronic applications that necessitate DC power, such as in electronic device power supplies and numerous industrial settings.