Are transformers capable of converting alternating current to direct current?

Transformers function on the principle of electromagnetic induction to transfer electrical energy between circuits while changing the voltage level of alternating current (AC). They are designed specifically to work with AC because the changing magnetic field in the transformer relies on the alternating nature of this current.

Since transformers operate by inducing voltage through changing magnetic fields, they cannot convert AC to direct current (DC). The conversion of AC to DC involves rectification, a process that requires additional components such as diodes. These components allow current to flow in only one direction, effectively converting AC into DC. Therefore, the statement that transformers are incapable of converting AC to DC is correct, affirming that the answer is accurate.

The incorrect options relate to various misconceptions about transformer function: suggesting that certain types of transformers can perform this conversion inherently overlooks their fundamental design, while the notion that transformers can do so, only in conjunction with rectifiers, misrepresents the role of each component in the electrical conversion process. Rectifiers are essential for the conversion process but must be employed alongside a transformer rather than implying the transformer's capability in this regard.