What device transforms DC to AC?

The device that transforms direct current (DC) into alternating current (AC) is known as an inverter. Inverters play a crucial role in various applications, particularly in renewable energy systems such as solar panels, where the generated DC electricity needs to be converted to AC for use in home appliances or the power grid.

Inverters work by utilizing electronic circuits to switch the direction of current flow, thus generating AC waveforms. This is essential for the compatibility of electrical devices that typically operate on AC supply.

The other device choices pertain to various functions in electrical systems: transformers are used to change the voltage level of AC but do not convert DC to AC. A converter generally refers to devices that can change between forms of electrical energy but may not specifically refer to the DC to AC transformation. Rectifiers, on the other hand, serve to convert AC to DC. Therefore, the proper function of transforming DC to AC is specifically assigned to inverters.