I am currently taking Physics 2 based on calculus course. This is were we learn about electric magnetism and electricity. The teacher assigned a presentation for each of the students. I need help on finding a interesting topic to talk about that relates to physics and also where to find information about it. This has to be something that it is used in life for example the electricity in the house, but I have to explain how it works. If anybody can help me I would greatly appreciate it. Thank you.