Mains electricity is AC (Alternating Current).
In more detail:
The electricity that comes from the wall outlets in homes and buildings is alternating current (AC). AC electricity periodically reverses direction, unlike direct current (DC), which flows in one direction. The frequency of this reversal is usually 50 Hz (in Europe and most of the world) or 60 Hz (in North America).
Here's a simple breakdown:
- AC (Alternating Current): Electricity that periodically reverses direction. Used for long-distance transmission and powering most household appliances.
- DC (Direct Current): Electricity that flows in one direction. Commonly used in batteries and electronic devices.
The reason AC is used for mains electricity is primarily due to its efficiency in long-distance transmission. AC voltage can be easily increased or decreased using transformers, allowing for high-voltage transmission (reducing energy loss) and then stepping down the voltage for safe use in homes.
