Pdf electric and magnetic fields the static electric. Em 93 electric fields and flux free pdf file sharing. Pdf study on origin of charge, current, electric field and. Electromagnetic em waves electric and magnetic fields. Many classroom experiments watch small pieces of iron fe line up around magnets along the field lines. E due to electric dipole, line of charge, charged disk. Define electric potential difference voltage and express the electric field between. The main aim here is not too teach you all the gory details of. Dipole in an electric field potential energy torque of an electric dipole. Appendix h electric and magnetic fields psc overview. Electric and magnetic fields the static electric field. If you place an object in a magnetic field, it will be affected, and the effect will happen along field lines. Unlike electric fields, magnetic fields are not reduced by trees, fences or buildings. Download electromagnetic field theory pdf 223p download free online book.
We learned in the previous sections that e and b selfsustain each. Electric appliances such as radios, refrigerators, microwaves, electric ovens, computers, tvs, and hair dryers produce magnetic fields. Field lines converge or come together at the poles. The science of electricity and magnetism is the foundation for the modern technological civilisation. The wiring that runs through floors, walls, and ceilings is also a source of magnetic fields when electricity is used see table 1. The strength of a magnetic field is measured in teslas, although we generally use a much smaller unit such as the microtesla. In what follows i will present some key experimental facts about electric and magnetic fields. Any device that uses electric current has a magnetic field. He claimed that the science of optics is intimately related to that of electricity and magnetism.
Pdf hermann minkowski in 1908 defined electric and magnetic fields as the tensorial concomitants of timelike body, ie by means of. Pdf electric field and magnetic field in a moving reference system. Magnetic poles are the points where the magnetic field lines begin and end. Relationship between the electric field and magnetic field. The power system and health electric and magnetic fields. Electricity, magnetism, and the electromagnetic field. Those poles are places where our planets field lines come together. Electric power, telecommunication, radio and television, and a wide variety.