Examples of charging by induction include rechargeable toothbrushes and smartphones that are charged wirelessly on charging docks. Inductive charging allows objects to be charged without being connected directly to an electrical outlet.
In commercial products, the induction charging process is powered by induction coils. In smartphones, both the phone and the charging dock contain induction coils of iron wrapped with copper wire. Placing the phone on the charging dock results in an electromagnetic field between the induction coils. Once the electromagnetic field is created, electricity is able to pass between the two induction coils, charging the phone wirelessly.
Two induction coils do not need to make direct contact in order to create a magnetic field. Simply placing the coils near each other is enough to generate a magnetic field and transfer electricity.