Explain construction of N-P-N transistor with the help of diagram

 Explain construction of N-P-N transistor with the help of diagram

Ans. 

                                                          

In this N-P-N transistor , it has basically three (3) regions i.e. emitter , base and collector .

         The junction which present in between Emitter and Base is called as or known as Emitter-Base junction .

            So that , similarly like as , the junction which present in between Base and Collector is called as or we can say that known as Base-Collector junction .

             In this N-P-N transistors , due to presence of two (2) junction in between three (3) region like as  Emitter , Base and Collector , it act like or we can say that in other words it behave like as two (2) PN junction diode .

             It is very interesting to know that , the doping level of all these three (3) regions are different .

              So in this , Emitter region are highly doped , the Base region is lightly doped and the  last region is collector region , which is come or fall in between Emitter and Base region or we can say that in other words that , the doping level of collector region is moderate .

             It is noteworthy or we can say that , it is notice-able that we cannot interchange or in other words , we cannot exchange the Emitter and Collector region .

              The reason for this , is that the thickness of the Collector region is some what greater than , the Emitter region . So , that it can dissipate more power or we can say that it can dissolve more power .