The Physics of Wireless Charging Explained

Wireless charging works through electromagnetic induction—no cables needed.
A charging pad has a coil that creates a changing magnetic field when powered.
The device being charged has its own coil that picks up this magnetic energy.
The magnetic field induces an electric current in the device’s coil.
That current is then converted into direct current (DC) to charge the battery.
Coils must be close together, which is why devices sit directly on charging pads.
Efficiency drops if the coils are misaligned or too far apart.
Resonant induction allows some chargers to work over slightly longer distances.
Wireless charging is slower than wired but more convenient and safer from wear.
From phones to electric cars, the same physics makes everyday charging easier.