AC (Alternating Current) is the type of electricity normally supplied to homes and buildings. In AC electricity, the direction of current changes periodically, making it practical for transmission over long distances and distribution through the electrical grid. Household appliances such as lights, fans, refrigerators, televisions, and air conditioners are generally designed to operate from the AC supply. For example, a wall socket in a house provides AC voltage, which powers a bed lamp when its switch is turned on.
DC (Direct Current) flows in one direction and is the form of electricity stored in batteries. An electric vehicle (EV) battery stores DC electricity, so the battery itself is a DC system. During AC EV charging, the charger inside the vehicle converts AC from the house into DC for the battery. During DC fast charging, an external charger converts the grid’s AC into DC before sending it directly to the EV battery, allowing much faster charging. Thus, a simple way to remember it is: House electricity → AC; EV battery → DC.
⚡ EV Charging & Master Bedroom Light
Interactive Electrical Engineering Simulation
⚙️ How the Electrical System Works
🔵 EV Charging: EV Charger → DC Cable → Battery
🔴 Bed Light: AC Supply → Plug Point → Switch → Lamp
🟡 Moving dots: represent the flow of electrical current.
💡 Turn ON the switch to illuminate the master-bed lamp.