Wireless charging is fast becoming the new standard for charging. QI has become the standard technology for this, especially now that Apple has integrated this technology into the new iPhones, after Samsung, LG and Nokia have already done so for several years. Read here how wireless charging actually works!
How does wireless charging work?
A wireless charger works with magnetic induction: a principle that was discovered by Michael Faraday in 1830. Without going into too much detail, it comes down to the fact that a voltage is created when a magnet moves quickly with respect to a ring of copper wire, even if they do not touch each other.
As a result, power is created without a physical connection to a power source: the basis for wireless charging as we now know it. The wireless chargers of today are of course a lot more advanced but are still based on this principle. Wireless chargers contain one or more copper coils that connect to the receiver in the smartphone or a specially designed phone case to ensure a stable and in some cases very fast transfer of power. Read more about differences between wireless chargers here .
Try it yourself!
The principle of wireless charging is easy to try and demonstrate yourself. All you need is a piece of copper wire, a light bulb and a magnet that you might have on the fridge.
Make a loop from the copper wire and connect it to the lamp. Now hold the magnet in the loop, and quickly move it back and forth so that the magnet comes closer and further away from the copper wire. See there: the lamp lights up a little! In the video below, this experiment is done with a meter, but the effect is very clear.