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Culture · Geography · Health · History · Mathematics · Natural sciences · Philosophy · Religion · Society · Technology The field of electronics comprises the study and use of systems that operate by controlling the flow of electrons (or other charge carriers) in devices such as thermionic valves and semiconductors. The design and construction of electronic circuits to solve practical problems is an integral technique in the field of electronics engineering and is equally important in hardware design for computer engineering. All applications of electronics involve the transmission of either information or power. Most deal only with information. Consumer electronics are electronic devices intended for everyday use by people. Consumer electronics usually find applications in entertainment, communications and office productivity. Consumer electronics are manufactured throughout the world, although there is a particularly high concentration of manufacturing activity in the Far East. One overriding characteristic of all consumer electronic products is the trend of ever-falling prices. This is driven by gains in manufacturing efficiency and automation, coupled with improvements in semiconductor design.  Hans Christian Ørsted (August 14, 1777 – March 9, 1851) was a Danish physicist and chemist, influenced by the thinking of Immanuel Kant. He is best known for discovering the relationship between electricity and magnetism known as electromagnetism. In April 1820 he noticed a compass needle deflected from magnetic north when the electric current from the battery he was using was switched on and off. This deflection convinced him that magnetic fields radiate from all sides of a live wire just as light and heat do. The CGS unit of magnetic induction (oersted) is named in honor of his contributions to the field of electromagnetism.  Credit: User:Markus Kuhn Circuit diagram of an IT earthing system.  Credit: Matt Gibbs, User:Matt Britt Macro shot of an Intel 80486DX2 CPU die in its packaging. The actual size of the die in the center is 12×6.75 mm. HP Labs announces the creation of a Memristor, the fourth basic element of electronic circuits with the Resistor, Capacitor, and Inductor. More...  On the third day of the 2007 Taipei IT Month in Taiwan yesterday, notebook computers and desktop computers built with AMD's Phenom processor and Intel Penryn processor openly battled for the consumer-market after each company launched their quad core processors. More... The new South Pole Telescope has recently collected its first light in a long-term project to learn about the nature of dark energy. More... A Sea Launch Zenit 3SL rocket has exploded on its Ocean Odyssey launch pad, just seconds before it was scheduled to launch. The engine had just been started when the rocket appeared to fall downwards, and was engulfed in a fireball. More...  The primary camera on the Hubble Space Telescope has shut down and is likely to only be restored to partial functionality, according to reports from NASA. More... Electronics - Consumer electronics - Engineering - Manufacturing - Symbols - Terms - Units - Waste Theory: Ampère's law - Coulomb's law - Frequency - Hall effect - Joule's laws - Kirchhoff's laws - Millman's Theorem - Moore's Law - Norton's theorem - Ohm's law - Peukert's law - Resistance - Thévenin's theorem-superposition - Wavelength Components: Antenna - Capacitor - Connectors - Diode - Fuse - Ground - Inductor - Integrated circuit - LCD - Magnetron - Phased array - Printed circuit board - Resistor - Thermocouple - Transformer - Transistor - Switch - Wire Circuits: AC - Bridge - Designs - Diagrams - DC - Impedance - Load - Series and parallel - Voltage divider - Voltage drop Fields: Avionics - Computer systems - Control systems - Electromechanics - Microelectronics - Military - Optoelectronics - Power - Quantum electronics - Radio - Robotics - Semiconductors - Spintronics - Telecommunications Products: Cameras - Computers - Fiber optics - Lasers - Lights - Mobile phones - Printed circuit board - Radios - TVs  Associated Electrics, Incorporated, also known as Team Associated, of Costa Mesa, California is one of the world's leading manufacturers of radio controlled cars, trucks and accessories. Team Associated cars have inspired small company's conversions. Several off-road buggies have been developed from the TC3 chassis, most notably the TC3 'o', the Durango range, and recently JConcepts with their BJ4 and Worlds-winning BJ4 'Worlds'. In physics, Coulomb's law is an inverse-square law indicating the magnitude and direction of electrostatic force that one stationary, electrically charged object of small dimensions exerts on another. It is named after Charles-Augustin de Coulomb who used a torsion balance to establish it. The magnitude of the electrostatic force between two point charges is directly proportional to the magnitudes of each charge and inversely proportional to the square of the distance between the charges. For calculating the direction and magnitude of the force simultaneously, one will wish to consult the full vector version of the Law
This vector equation indicates that opposite charges attract, and like charges repel. When |
is the electrostatic force vector, 
is the distance vector between the two charges, 
is position vector of 
is position vector of 
is a 
, and 
is negative, the force is attractive. When positive, the force is repulsive.
