Electric Motors And Generators/Magnetic Field Concepts

Magnetic Field Concepts An electromagnetic field is a region of space in which electrical charges experience forces. The classical definition of the electromagnetic field is given by the following equation   What this equation states, is that an electrical charge of size q experiences a force when in the presence of an electric field denoted by E. Furthermore if the charge is moving, with velocity v, it will experience a further force if in the presence of a magnetic field denoted by B. Therefore the force on a electric charge defines what the electric and magnetic fields are in a given region of space. Without the presence of a charged particle it could never be known what their magnitudes or directions were. Further Reading on Magnetism See Magnetic field and Magnetic phenomena and Physics Study Guide/Magnetism and Permanent magnets and Current's magnetic effects and Electromagnetism and Magnetism's units. Wikipedia: Magnet and Wikipedia: Magnetic forces and Wikipedia: Magnetism and Wikipedia: Magnetism's origin Further Reading on Electric Current See Current and Kirchoff's Current Law (KCL) and Current (Physics) and Relationships: voltage, current and resistance. Wikipedia: Current and Wikipedia: DC and Wikipedia: AC.