Show the introduction. It presents the topic in general by means of a question useful to know how much students know about it. You can present the contents of this learning object. We use electric devices everyday such as cell phones, computers, appliances, bulbs, lanterns, and TV remote controls, among others. Electricity is part of our everyday life; something essential for everything we do. However, we may not know the difference between the electric circuit of a lantern and the electric circuit of a bulb at home. Do you know why you have to use an adapter to connect your cell phone, but you can connect the TV directly to the wall at home? You will be able to answer this and other questions through this learning unit. Additionally, you will find interesting information about electrical networks in our country.