The purpose of today's presentation is to introduce electric five most important inventions. The presentation will take place according to the plan, which is visible on the slide. Presentations will begin in 1876 and the invention of the radio by Alexander beautiful and Elisha Grey, the next invention will bulb invented by Thomas Edison Alve. Invention will be described also by Nicola Tesla, the induction motor, as well as the phone was invented in 1896 by Guglielmo Marconi, and in the end we get to the 20th century and constructing pred Ed Roberts PC.

motor

Practical alternating current induction motors seem to have been independently invented by Galileo Ferraris and Nikola Tesla. Tesla applied for U.S. patents in October and November 1887 and was granted some of these patents in May 1888

An induction or asynchronous motor is an AC motor in which current is induced in the rotor winding by the magnetic field of the stator winding, by electromagnetic induction. Therefore they do not require the sliding electric contacts, such as a commutator or slip rings, which are needed to transfer current to the rotor winding in other types of motor such as the universal motor. Rotor windings consist of short-circuited loops of conductors and are made in two types: the wound rotor and the squirrel-cage rotor.

asynchronous motors, fed by the inverter, suitable for use in traction drives. They are used in various types of electric vehicles such as electric vehicles and in electric motorcycles or trucks.

Personal

The idea was born out of personal computers in the early 70s Not really, it is clear that the computers can be considered as the first such machine. Preeminence arguing about here Xerox, Hewlett-Packard and IBM. It seems that the first personal computer (PC) widely recognized by the "western world" was a construction company called MITS Altair 8800 - presented by Ed Roberts and Bill Gates in the January issue of Popular Electronics Magazine (1975). Undoubted fact is the fact that the first this kind of mass-produced computer, which actually came "to the masses" was the Apple I. now pc is mainly intended for personal use at home and office. It is mostly used to run office software, Internet resources, presentations, multimedia content (text, images, sounds, videos, etc.), as well as games.