In 12th grade phyisc class I gave this speech about transformators (which was rated with 14 out of 15 possible points). Now you can download it as PDF file. Be assured that anything which won't be mentioned still exists but is of no practical use in most situations. Unfortunatly the texts are all german.
Although we're talking about a physic class speach I can't give you a guarantee that it is complette or perfectly correct. You are free to use the material in your own lessons. If you want to use it for a speech don't forget to mention my name and this website as source.
Interessted in more physics? Even in english? I'd be glad to write down my knowledge. But only when needed.
