Magnetic Field Due To Current
Electric current, its measurement and the thermal and chemical effects of current and more about magnetic effects of current and magnetism all these are ready to be studied in this aspect. Earlier it was thought that there is no connection between electricity and magnetism. However, in the year 1820, Oersted realized that electricity and magnetism were intimately reacted. He experimentally showed that the electric current through the straight wire causes noticeable deflection of the magnetic compass needle held near the wire. He also found that the magnetic needle is aligned congenitally to an imaginary circle which has the straight wire as its centre and has its place perpendicular to the wire if the direction of current in the wire is reversed the direction of deflection of the magnetic needle is also reversed the deflection increases on increasing the current in the wire or bringing the magnetic compass needle closer to the wire,
He also found that the iron fillings sprinkled around the wire arrange themselves in concentric Circes with the wire as centre in the plane perpendicular to the wire,
This shows that the magnetic field is associated with a current carrying wire. A magnetic filed in a region can be represented by magnetic lines of force or magnetic field lines, the details of which have been given in unit
An electric current in a conductor is due to the charge (or electrons) in motion such charges produce magnetic interaction. The magnetic field produced due to the current through the conductor interacts with the magnetic needle and deflects it. The branch of physics which deals with the magnetism due to electric current is called.
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