transistor as physics project of class 12
#1

hi...i am a student of class 12th. I want a project file on transistor....if it is nt possible dn plzz give me some information about it...plzz
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#2
A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power. It is composed of semiconductor material usually with at least three terminals for connection to an external circuit. A voltage or current applied to a pair of transistor terminals controls the current through another pair of terminals. Because the controlled power (output) can be greater than the control power (input), a transistor can amplify a signal. Today, some transistors are packaged individually, but many more are integrated into integrated circuits.

The transistor is the fundamental component of modern electronic devices, and is ubiquitous in modern electronic systems. Julius Edgar Lilienfeld patented a field effect transistor in 1926, but at that time it was not possible to build a functioning device. The first device implemented in practice was a point contact transistor invented in 1947 by American physicists John Bardeen, Walter Brattain and William Shockley. The transistor revolutionized the field of electronics and paved the way for smaller, cheaper radios, calculators and computers, among other things. The transistor is on the list of IEEE milestones in electronics and Bardeen, Brattain and Shockley shared the 1956 Nobel Prize in Physics for their achievement.

Most transistors are made of very pure silicon or germanium, but other semiconductor materials can also be used. A transistor may have only one type of load carrier, in a field effect transistor, or it may have two types of load carriers in bipolar junction transistor devices. Compared to the vacuum tube, the transistors are generally smaller and require less power to operate. Certain vacuum tubes have advantages over transistors at very high operating frequencies or high operating voltages. Many manufacturers of multiple types of transistors manufacture standardized specifications.
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