SIMPLE CHARGER:
Usually there are two different types of electric current AC (alternative current) and DC (direct current). In DC current the electric charges flow in one direction whereas in AC current the electric charges periodically reverse its direction. The current we normally use in our house is an AC current and the current stored or charged in a battery is DC current.
A charger usually have four components a transformer, a rectifier which converts AC current to DC because we are charging here is a battery of a phone, a filter which smooth the output of a rectifier. A voltage regulator which maintains a constant voltage. Hence, in this type of charging a wire is connecting to a device to charge it.
ELECTROMAGNETIC INDUCTION:
Electromagnetic induction is a process of producing electricity with the presence of magnetic field, which can be done when either electric conductor (an object that allows electricity to pass through it) or magnetic field move.
WIRELESS CHARGING:
Wireless charging works by transfer of energy from the charger to the receiver in the back of the phone through electromagnetic induction, it is just like receiving Wi-Fi from a source like router to our mobile phones. In this process the electromagnetic field created by the coil that present in the charger is converted into electricity by the receiver in the phone and start charging. So certain type of phone can only be charged by using a wireless charger.
DISADVANTAGES OF WIRELESS CHARGING:
* While compared with wired charging the wireless charging takes more time to charge a phone hence it was not a fast charger.
* The phone cannot be charged if it is away from the charger.
* It is more expensive than a wired charger.
Types of Wireless charging;
- Electromagnetic Induction
- Magnetic Resonance
- Electric Field Coupling
- Radio Reception
"Gokula Kannan "
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