About the Book
This book consists of articles from Wikia. Pages: 65. Chapters: Electronic circuits, Alternating current, Avalanche diode, Avalanche transistor, Capacitor, Capacitor, Direct current, Electric current, Electric power, Inverter, Rectifier, Resistor, Switched-mode power supply, Alternator, Ampere, Analogue, Avalanche breakdown, Avalanche diode, CAD, Communications system, Compulsator, Computer, Computer-aided design, Digital circuit, Diode, Electrical network, Electronic control unit, Electronic warfare engineering, Engineering drawing, Fanout, Frequency, Ignition system, Impedance, Inductor, Logic gate, Magnetic flux, Nickel-cadmium battery, Ohm's law, Oscillation, Potential difference, Power, Power supply, Protocol, Radio frequency, Radio waves, Regulator, Satellite Based Augmentation System, Semiconductor, Siemens, Submarine communications cable, Switch, Tool, Tool, Transmission, Valve, Voice over Internet Protocol, Watt. Excerpt: An alternating current (AC) is an electrical current where the magnitude and direction of the current varies cyclically, as opposed to direct current, where the direction of the current stays constant. The usual waveform of an AC power circuit is a sine wave, as this results in the most efficient transmission of energy. However in certain applications different waveforms are used, such as triangular or square waves. Used generically, AC refers to the form in which electricity is delivered to businesses and residences. However, audio and radio signals carried on electrical wire are also examples of alternating current. In these applications, an important goal is often the recovery of information encoded (or modulated) onto the AC signal. William Stanley Jr designed one of the first practical coils to produce alternating currents. His design was an early precursor of the modern transformer, called an induction coil. From 1881 to 1889, the system used today was devised by Nikola Tesla, George Westinghouse, Lucien Gaulard, John Gibbs, and ...
