1. Generators, Magnets, and Motors

2. Generators A generator is a device that produces electrical energy from mechanical energy.

3. Generators Batteries convert chemical energy into electrical energy Generators convert mechanical energy into electrical energy

4. Hydroelectric Generators In hydroelectric generators, a magnet and coil apparatus is moved by the force of falling water.

5. Types of Magnets To generate electricity you must use a permanent magnet A permanent magnet is a piece of hard steel alloy that stays magnetized for a long time.

6. Types of Magnets An electromagnet is a coil of wire, usually with an iron core, that becomes magnetized when current exists in it. The north and south poles of an electromagnet are reversed.

7. How a Simple Electric Motor Works An electric motor is made to work through the interaction of permanent magnets and electromagnets.

8. How a Simple Electric Motor Works

9. Homework Questions 1) What is a permanent magnet? 2) What is an electromagnet? 3) What does a generator do? 4) What is the difference between batteries and generators? 5) How does an electric motor work? 6) What part of an electromagnet becomes magnetized when current electricity exists in it?