Inductive coupling

In electronics inductive coupling is the transfer of energy from one circuit component to another through a shared magnetic field. A change in current flow through one device 'induces' current flow in the other device. The two devices may be physically contained in a single unit, as in the primary and secondary sides of a transformer, or may be seperated as in the antenna on a transmitter and a reciever. Coupling may be intentional or unintentional. Unintentional coupling is called cross-talk, and is a form of interference. Inductive coupling favors low frequency energy sources. High frequency energy sources generally use capacitive coupling.