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  Point-Contact Symbol
Just as the diode, there is a schematic representation of the point-contact transistor. As you might notice there is a high resemblance between the schematic symbol and the physical transistor. The emitter is always represented with an arrow.
 
     
   
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MLA style: "The Transistor". Nobelprize.org. Nobel Media AB 2014. Web. 16 Sep 2014. <http://www.nobelprize.org/educational/physics/transistor/function/pointsymbol.html>

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