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14. Feb. 2016 · In 1729 AD, an lJnglish scientist Stephen Gray classified rnaterials as conductors and insulators. "Vitreous" and "l {csinous" electricity. Cunaeus invented a device that stores static electricitv ...
- 1.1 What Is Electronics
- 1.2.1 Revisiting the History
- 1.3 Widespread Applications
- 1.4 Electrons, Electricity and Electronics
- 1.4.1 Electric Current
- Think a Bit: Current, Current Density and Vector
- 1.4.2 Drift Velocity, Mobility and Conductivity
- 1.4.3 Electron Emission from Metal
It is understood from our everyday experience that electronics is somehow related to the use of electricity. However, electricity is found in nature also, whereas electronic devices and the use of electricity in those devices are totally man-made. The techniques of electronic devices established several novel aspects in the use of electricity, whic...
Electronics got maturity as a combination of two diferent trends of research: development of wireless communication and invention of vacuum tubes, and subsequent replacement Note: J. C. Bose’s Pioneering Contributions Bose at Presidency College (now University) carried out ground breaking experiments on generating, transmitting, and receiving elect...
Electronics has developed as a combination of science and technology. The construction of electronic devices and circuits is based on the concept of electrical engineering while the background theories have originated from fundamental physical and chemical sciences, and mathematics. The theory and application of electronic devices have enriched oth...
The history of science is often stranger than science fiction. Without knowing the fact that electric current through metallic wire is nothing but the flow of electrons, mankind had invented battery, dynamo and motor. Also the prime laws of current electricity including Ohm’s law and Kirchhof’s laws were propounded prior to the discovery of electro...
Electric charge is the basic entity that assigns electrical property to an object. When two charged conductors are connected, charge flows from one to the other, and both objects acquire a common potential. This is an instantaneous and uncontrolled process. Rubbing a silk with a glass rod, discharging a capacitor, and thundering are such examples. ...
Electric current has a direction but it is not vector because it does not obey the laws of vector addition. The sum or diference of 2 mA and 5 mA produces 7 mA or 3 mA only with the proper sign and nothing else. Current density is but a vector quantity because it describes how the charges flow at some point across a certain area. The vector directi...
In absence of any voltage and consequent electric field, the free charge carriers of a conductor undergo random motion in all directions due to thermal agitation, so that the resultant velocity is zero. When a voltage is established across the conductor, the electric field accelerates the charge carriers along it. Simultaneously the random motion a...
Some electronic devices and related systems require the electrons to physically come out of the metal kept in vacuum. The outermost electrons in a metal are loosely associated with the ion core and can move freely within the metal boundary leading to its high conductivity. However, the electrons cannot escape the metal surface under ordinary condit...
Electronics in the early 20th century started thriving at a greater speed unlike the pre-20th century developments. From the starting itself the electronics got its special recognition. The radio invented by the Italian genius Marconi and the work of Henry Hertz opened the road to further discoveries and inventions.
The Prehistory of Electronics. It is true that electronics developed from the study of electricity. Early ideas about the way electric current could flow through conductors and through a vacuum led to the development of useful radio systems and telephones.
- John Watson
- 1986
History of electronics (1) considered as one of the most important mathematicians ever as inventor of mathematical analysis and the number theory. Mathematical symbols for natural base e, irrational number π and the symbol Σ for sum of series were introduced by Euler. Proved that lightning is electricity.
The Electronics Revolution. Inventing the Future. Book. © 2017. Download book PDF. Download book EPUB. Overview. Authors: J.B. Williams. Shows the impact of electronics and computing on the individual as well as society at large. Covers the inventors, inventions, and developments in the field of electronics and computing.
History of Technology Network . Selected landmarks in . The History of Electronics. A contribution to the Institution's 150th anniversary celebrations in 2021 from the IET History of Technology Network . This is one of a series of timelines which focus on a selection of engineering and technology
