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For your first question a trasistor is a semiconductor that is used to amplify and switch electronic signals and electrical power. And an integrated circuit is a set of electronic circuits on one small plate that normally is from sillicon
Added 1/4/2014 6:08:23 AM
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An IC or Integrated Circuit is a set of electronic circuits on one small plate of semiconductor material, normally silicon. This can be made much smaller than a discrete circuit made from independent components.
en.wikipedia.org/wiki/Integrated_circuit
Added 1/4/2014 6:44:12 AM
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A transistor is a semiconductor device used to amplify and switch electronic signals and electrical power. It is composed of semiconductor material with at least three terminals for connection to an external circuit. A voltage or current applied to one pair of the transistor's terminals changes the current through another pair of terminals.
Added 1/4/2014 7:17:47 AM