Start with the statement "magnetism can produce electricity and electricity can produce magnetism". Describe how an electromagnetic wave is produced from a moving charge and a moving magnetic field. State Faraday's law and how it applies. Show how a generator produces a current from a rotating wire through a magnetic field, and how the current can be increased. Describe the difference between DC and AC current, and the "contest" in the late 1800's between Edison's DC and Tesla's (Westinghouse's) AC current to light up NY. Show why AC is more efficient, can transmit at higher voltage for longer distances, but required a step down transformer before entering the residence. Describe how the transformer works,both step up and step down types. Introduce electromagnetic waves, show sketched images of EM waves and describe how they propagate.