Question
Download Solution PDFIn a PNP transistor, the base is of ___________ material.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct option is 1
Concept:
As per the acronym PNP, it indicates the order of layers in the transistor. The transistor is made up of two "P" type materials separated by an "N" type material.
In a PNP transistor, the first and third layers ("P" layers) are p-type semiconductor materials, and the middle layer (the "N" layer) is n-type semiconductor material.
So, the layers in a PNP transistor go P-type (Emitter) - N-type (Base) - P-type (Collector). Therefore, the base material in a PNP transistor is N-type semiconductor material. Hence option 1) N is correct.
PNP:
For a PNP transistor, when the emitter-base junction is forward-biased, holes from the emitter start to flow to the base. The direction of the arrow also indicates the same.
Additional Information
NPN:
For an NPN transistor, when the emitter-base is forward-biased, holes from the base (p-type) start to flow to the emitter side (n-type) and electrons start to flow from the emitter to the base. The direction, however, represents the direction of the hole flow.
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