Need note on transistor
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A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power. It is one of the fundamental building blocks of modern electronic circuits.
Essentially, a transistor works by using a small voltage or current applied to one of its terminals (the base or gate) to control a much larger current flowing between its other two terminals (the collector and emitter, or drain and source). This control allows it to function either as an amplifier (making a weak signal stronger) or as an electronic switch (turning current flow ON or OFF). The two main types are Bipolar Junction Transistors (BJTs) and Field-Effect Transistors (FETs).
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