What uses alternating current?

What uses alternating current?

• A. Mains electricity
• B. Battery-powered devices
• C. Laptop batteries
• D. Solar panels only produce DC

Answer: (A)

Alternating current changes direction periodically, which makes it ideal for sending power long distances. The electrical grid uses AC because voltage can be stepped up or down easily with transformers, allowing high-voltage transmission with lower losses and safe, low-voltage supply at homes. That direct AC supply is what powers most household appliances. Batteries, laptop batteries, and solar panels produce or store energy as direct current. If AC is needed, that DC must be converted (often by an inverter or power supply) before use. So the thing that uses alternating current directly is the mains electricity that comes from the wall outlets.

Alternating current changes direction periodically, which makes it ideal for sending power long distances. The electrical grid uses AC because voltage can be stepped up or down easily with transformers, allowing high-voltage transmission with lower losses and safe, low-voltage supply at homes. That direct AC supply is what powers most household appliances.

Batteries, laptop batteries, and solar panels produce or store energy as direct current. If AC is needed, that DC must be converted (often by an inverter or power supply) before use. So the thing that uses alternating current directly is the mains electricity that comes from the wall outlets.