Which device converts DC to AC?

Which device converts DC to AC?

• A. Rectifier
• B. Inverter
• C. Transformer
• D. Converter

Answer: (B)

The device that turns direct current into alternating current is an inverter. It takes DC from a source such as a battery and uses fast switching electronics to create a pulsating current that reverses direction, forming an alternating output. A filter smooths that signal into a usable AC waveform, often close to a sine wave for broad compatibility with AC devices. This lets you run AC equipment from a DC source, which is common in battery systems, solar setups, and backup power. In contrast, a rectifier does the opposite by converting AC to DC. A transformer needs AC to operate because it relies on changing magnetic fields to transfer voltage; applying DC would saturate the core and produce little to no useful output. The term converter is broad and can refer to various DC-DC or AC-DC devices, but the precise term for DC-to-AC conversion is inverter.

The device that turns direct current into alternating current is an inverter. It takes DC from a source such as a battery and uses fast switching electronics to create a pulsating current that reverses direction, forming an alternating output. A filter smooths that signal into a usable AC waveform, often close to a sine wave for broad compatibility with AC devices. This lets you run AC equipment from a DC source, which is common in battery systems, solar setups, and backup power.

In contrast, a rectifier does the opposite by converting AC to DC. A transformer needs AC to operate because it relies on changing magnetic fields to transfer voltage; applying DC would saturate the core and produce little to no useful output. The term converter is broad and can refer to various DC-DC or AC-DC devices, but the precise term for DC-to-AC conversion is inverter.