This electric motor, an electric current causes the coil to rotate, changing

When a current passes by the electromagnet, a magnetic field is designed in the coil. Changing the magnetic field the current makes the loop in an electrical device to sustain revolving. The generation of an electric current by passing a loop of wire by a magnetic field or moving a magnet by a wire loop.

This electric motor, an electric current causes the coil to rotate, changing and to produce a magnetic field. When the coil is moved then the magnetic lines changes and produce a magnetic field. So the changing of magnetic lines causes the current to flow.  

its c its is a mixture of gases