Many electrical topics have to do with electricity in general. They include "How Electricity Works," "The History of Electricity" or "Electricity Today." You also might write about different types of electrical power, such as that derived from coal or natural gas.
Electrical wires and wiring practices are important to the overall concept of managing electricity, and thus make for good topics. Such topics include wiring a home, a town, or wiring for a specific purpose, such as to provide electricity to an outdoor stadium or a home recording studio.
There are also topics that you can use for your papers and presentations that deal with other types of electrical components. Wiring, transformers, towers and electrical boxes are all important to the general handling of electricity and each is worthy of presentation.
Electricity and electrical components have a much broader impact than most people realize. They bring power to millions of people around the world. You might want to consider topics such as "Electricity in Developing Nations," "Solar Energy" or "Financial Ideas When it Comes to Electricity." These topics allow you to stay broaden the scope of the discussion from technical considerations to everyday applications and impact.