how do wireless chargers that you just place your phone on work?
In: Technology
They work with inductance. The charger has coils where a current is run through. This creates a magnetic field which can travel through air. A phone with wireless charging also has a coil in the back which picks up this field and translates it to an electric current.
By monitoring the current and changing the field the devices are able to “see” and talk to each other.
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