When a magnet moves in relation to an electromagnetic coil , this changes the magnetic flux passing through the coil .
When a magnet moves in relation to an electromagnetic coil , this thus induces the flow of an electric current , which can be used to do work .
When a magnet moves in relation to an electromagnetic coil , this changes the magnetic flux passing through the coil , and thus induces the flow of an electric current , which can be used to do work .