Electric generators are very essential to modern human life. Most generators generate electricity with a turbine (shown in the figure above) of some type. Various methods are used to spin the turbines; a majority of power plants burn coal, and others use nuclear fission, natural wind, or water. However once the turbine is spun, these different types of power plants all share the same principle when generating electricity from the spinning turbine. Which of the following devices also uses the same principle as the turbine-driven electric generator?