Which device converts DC to AC power?

• A. Rectifiers
• B. Inverters
• C. Transformers
• D. Regulators

Answer: (B)

Converting DC to AC requires a device that continually reverses the direction of current to create alternating voltage. An inverter does this by switching a DC source on and off in a controlled way and using an arrangement like an H-bridge to produce output that alternates in polarity. The resulting AC can be shaped into sine waves or stepped approximations, which is why in systems like solar panels, battery backups, and uninterruptible power supplies you see DC stored energy being turned into usable household AC.

Rectifiers do the opposite: they convert AC to DC, not DC to AC. Transformers adjust the voltage of AC signals and need AC input to work. Regulators stabilize or limit DC output to a fixed level, but they don’t generate AC from DC.