This lesson plan will take approximately 50 minutes. According to the Law of Conservation of Energy, we cannot create or destroy energy, but we can change its form. That means we can transmit energy great distances in its electrical form and, when it arrives at its destination, change it into its mechanical form to do work. The most common device for changing electrical energy into mechanical energy is the motor.
Most motors use electromagnets to cause mechanical rotation, which can do work.
The most fundamental element of the AC motor is the electromagnet, a magnet made from electric current. In the first Demonstration Experiment below, you can make and demonstrate an electromagnet to show students the most basic method of changing electrical energy into mechanical energy. Make some simple drawings of how magnets work in the operation of a motor. Discuss the use of the motor in industry and how other applications of the motor might work. Scientists usually inquire about how physical, living, or designed systems function.