Resonant inductive coupling is a method of transferring energy wirelessly between two coils that are tuned to the same frequency. This technique relies on the principle of electromagnetic induction, where an alternating current in one coil generates a magnetic field that induces a current in the second coil. By matching the resonant frequencies of both coils, energy transfer becomes more efficient, allowing for effective wireless power transmission over short distances. This technology is commonly used in applications like wireless charging for smartphones and electric vehicles. It enables devices to charge without physical connectors, enhancing convenience and reducing wear on charging ports.