17.14 Rectification
Rectification is the process of converting alternating current into direct current. Diodes allow current to flow in one direction (forward bias) but block it in the opposite direction (reverse bias).Rectification is of two types, half wave rectification and full wave rectification. Rectification is commonly used in electronic devices that require a stable DC power source, such as computers and smartphones, as most household and commercial power is AC.
(Fig. 17.13: Working of a half-wave rectifier, showing graphically its input and output wave forms.)
Brain teaser
lightbulbCell phones store AC or DC? Cell phone batteries store DC in them, since it is easier to store DC than AC. DC is also safer compared to AC. The electric grid provides AC only. Therefore, the AC is converted to DC using a rectifier before charging the cell phones or any other portable devices such as laptops, flashlights, etc.