Electrical engineering is an applied field of science and technology that deals with the study and practical application of electricity, electronics, and electromagnetism. The discipline encompasses the design, development, and implementation of electrical machinery and systems, ranging from low-voltage household appliances to high-voltage power transmission networks. Core areas of study include alternating and direct current theory, circuit analysis, signal processing, and control systems. Modern applications of the field are vast, supporting the infrastructure for computing, telecommunications, power generation and distribution, and automated control mechanisms used in industries such as aerospace and manufacturing. The fundamental principles involve manipulating electrical energy to perform work, which forms the basis for almost all modern electronic devices.