ABSTRACT
Static magnetic fields are characterized by magnetic field intensity and magnetic flux density. They are obtained when the static charges are moving with constant velocity or static magnetic fields are generated by constant current flow. Electrostatic fields are described by Coulomb’s law and Gauss’s law. Similarly magneto static fields are described by Biot-Savart’s law and Ampere’s circuit law. This chapter discusses the applications of Ampere's circuit law in an infinite line conductor, infinite sheet, and infinitely long co-axial cable. In electrostatics only scalar potential is related with electric field intensity, where as in magneto static fields both scalar and vector potentials are related with magnetic field intensity. There are three ways in which force due to magnetic field can be experienced. Force can be due to a moving charge particle in magnetic field, on current carrying element by an external magnetic field, and between two current carrying elements.
