This page provides a concise introduction to electrical engineering (EE) as well as basic formulas and theorems. Electrical engineering is a discipline that deals with electricity, magnetism and their applications. EE applications include electronics, power conversion, data communications, computer science, information technologies, and other. The term EE usually encompasses electronic engineering or electronics. Electronics involves the design and analysis of electronic circuits. 


In academia and electronic industry, the terms electrical and electronics engineer often are used interchangeably. In other industries, the term electrical engineer may refer to those who deal with utility and industrial power systems and other electric equipment. In any case, both disciplines are overlapping. The theoretical foundation for EE is electromagnetism. The theory of classical electromagnetism is based on Maxwell's equations. They provide a unified description of the behavior of electric and magnetic fields as well as their interactions with matter. In practice however, Maxwell's equations are rarely used in an electrical design. The circuit designers normally use simplified equations of electricity and magnetism and theorems that use circuit theory terms, such as Ohm's law modified for AC circuits, voltage and current Kirchoff's laws, as well as power relationships (see below). This webpage is for those who have already learned EE and need a quick reference information. Here you will find electricity and magnetism basics, electronics reference as well as the career related information online. Also see: Electrical formulas and impedance calculations; Electronic parts datasheet and crossreference; Distance learning: engineering degree online from accredited schools and salary surveys. 

You can download a printable reference sheet with these and other equations in a pdf file.

ELECTRONICS REFERENCE  ELECTRICITY AND MAGNETISM ONLINE TEXTBOOKS, HANDBOOKS and COURSES  
Basic electrical engineering formulas and circuit calculations Electronic and safety standards Electronic components online parts search and cross reference 
Work, energy and power in electric field Classical Electromagnetism relationships: Maxwell's equations, energy, relativity Electricity and magnetism, field and energy free textbook course 