1. How does a "potato battery" work?

2. What is the name of the device that converts chemical energy into electricity?

3. What is the name of the device that converts movement energy into electricity?

4. What is the name of the device that converts light energy into electricity?

5. What is the name of the device that rotates the generator of a water power plant?

6. What element is contained in photoelectric cells?

7. What is similar between an electric motor and a generator?

8. How many electric pairs are there in a 6 volt battery?