1. How is electricity for houses generated at the power plant?
My answer: At thermal power stations where heated water turns into steam which rotates a steam turbine, driving the electrical generator.
2. How is that electricity transferred? How can you estimate the voltage of a power line by looking at it?
My answer: Through power lines. (Not sure about 2nd part of question)
3. What is the name of an electrical device that changes the voltage from power company from high voltage to low voltage? Does that device work from both AC and DC?
My answer: Transformers. Yes it works for both AC and DC.
Im not sure if all my answers are right. thank you guys for checking and could you also provide me with the correct answer if i made a mistake?