MEEN 225 Lecture Notes - Lecture 9: Magnetic Field, Motor Action F.C., Electromagnet

• School: Texas A&M University
• Department: Mechanical Engineering
• Course: MEEN 225
• Professor: John Steven Haglund

Document Summary

Objects which produce their own magnetic field are called magnets. Magnetic field is the region around a magnet where magnetic effects can be experienced. A magnetic line of force (or flux line) is a continuous line whose direction at any point is the direction of the magnetic field at that point. The magnetic flux, through a region is a measure of the number of magnetic field lines passing through the region. The ease with which a material will conduct magnetic lines force is called permeability. An electromagnet is a type of magnet whose magnetic field is produced by the flow of electric current. The magnetic field disappears when the current ceases. Magnetic fields are the fundamental mechanism by which energy is converted from one form to another in motors, generators, and transformers. The magnitude and direction of a magnetic field can be represented by its magnetic flux density, b.