Electric Motor Reading Worksheet Instructions: Read the following passage about the idea of an electric motor and answer the questions on the information. Electric motors are a type of machine that converts electrical energy into mechanical energy. They are commonly used in various applications, such as industrial machinery, household appliances, and transportation systems. The principle behind electric motors is based on the interaction between magnetic fields and electric currents. When an electric current is passed through a coil of wire, a magnetic field is produced around the wire. This magnetic field interacts with the magnetic field of a permanent magnet, resulting in a rotational force that causes the motor to turn. The basic components of an electric motor include a rotor, a stator, and a commutator. The rotor is the rotating part of the motor that contains the permanent magnet, while the stator is the stationary part that contains the coil of wire. The commutator is a mechanism that allows the current to be directed to the correct part of the coil at the right time. As the current passes through the coil, the magnetic field produced by the coil interacts with the magnetic field of the rotor, causing the rotor to turn. There are various types of electric motors, each with different characteristics and applications. For example, DC motors are commonly used in small appliances and toys, while AC motors are used in larger applications such as industrial machinery and electric vehicles. In addition, there are specialized motors such as stepper motors and servo motors, which are used in precise control systems. One of the advantages of electric motors is their efficiency. They can convert up to 90% of the electrical energy they receive into mechanical energy, which is significantly higher than the efficiency of internal combustion engines. Electric motors also have a lower environmental impact, as they do not produce emissions and are powered by electricity from renewable sources. In conclusion, electric motors are a critical component of many modern systems, from household appliances to electric vehicles. They operate by converting electrical energy into mechanical energy through the interaction between magnetic fields and electric currents. With their high efficiency and low environmental impact, electric motors are likely to become even more important in the future. Questions: 1. What is an electric motor? 2. How does an electric motor work? 3. What are the basic components of an electric motor? 4. What is the function of the commutator in an electric motor? 5. What are some applications of electric motors? 6. What is a DC motor? 7. What is an AC motor? 8. What is the efficiency of electric motors? 9. How do electric motors compare to internal combustion engines in terms of efficiency? 10. What is the environmental impact of electric motors?
