ELECTRICAL ENCYCLOPEDIA

Direct Current Generators http://www.tpub.com   A generator is a machine that converts mechanical energy into electrical energy by using the principle of magnetic induction. This principle is explained as follows; Whenever a conductor is moved within a magnetic field in such a way that the conductor cuts across magnetic lines of flux, voltage is generated in the conductor. The AMOUNT of voltage generated depends on (1) the strength of the magnetic field, (2) the angle at which the conductor cuts the magnetic field, (3) the speed at which the conductor is moved, and (4) the length of the conductor within the magnetic field. continue.. DC Generators Action http://micro.magnet.fsu.edu   Simple direct current (DC) generators contain an armature (or rotor), a commutator, brushes, and a field winding. The interactive tutorial presented below examines the operation of a simple DC or direct current generator. A variety of sources can supply mechanical energy to the DC generator to turn its a

What is Static Electricity? http://en.wikipedia.org   Static electricity refers to the build up of electric charge on the surface of objects. The static charges remain on an object until they either bleed off to ground or are quickly neutralized by a discharge. Static electricity can be contrasted with current (or dynamic) electricity, which can be delivered through wires as a power source. Although charge exchange can happen whenever any two surfaces come into contact and separate, a static charge only remains when at least one of the surfaces has a high resistance to electrical flow (an electrical insulator). The effects of static electricity are familiar to most people because we can feel, hear, and even see the spark as the excess charge is neutralized when brought close to a large electrical conductor (for example, a path to ground), or a region with an excess charge of the opposite polarity (positive or negative). The familiar phenomenon of a static 'shock' is caused by