Inductive coupling is a method of transferring electrical energy between two coils through electromagnetic fields. When an alternating current flows through one coil, it creates a magnetic field that induces a voltage in a nearby coil. This principle is commonly used in wireless charging systems for devices like smartphones and electric toothbrushes. This technology relies on the proximity of the coils, as the efficiency of energy transfer decreases with distance. Inductive coupling is also utilized in various applications, including RFID systems and transformers, which help in voltage conversion for electrical power distribution.