20.2 Motors, Generators, and Transformers

• Electric motors, which convert electrical energy into mechanical energy, are the most common application of magnetic force on current-carrying wires
• A device such as this that converts mechanical energy into electrical energy is called a generator
• Another very useful and common device that exploits magnetic induction is called a transformer. Transformers do what their name implies—they transform voltages from one value to another; the term voltage is used rather than emf because transformers have internal resistance