Electrotechnics. Electrotechnics is the technological discipline that studies the applications of electricity and encompasses the study of electrical and electromagnetic phenomena from the point of view of the practical utility of electricity included in three major fields of knowledge and experience: The scientific concepts and laws that explain the operation and behavior of the different devices, receivers and electrical machines. The laws, theorems, principles and techniques of analysis, calculation and prediction of the behavior of circuits The elements with which circuits, appliances and electrical machines are assembled and built. ELECTRIC CURRENT. Electric current is a movement of millions of free electrons, through a conductor. For there to be current it is necessary that the conductors form a closed circuit. The current intensity depends on the number of electrons passing through the conductor section in a given time. The motion of a Coulo...