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why is the conductivity of n- type semiconductor greater than that of p- type semiconductor even when both of these have same level of doping ? |
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Answer» (1) In a p-type semiconductor, holes are majority charge carriers.(2) Holes behave as positive charges. When a p-type semiconductor is connected to a battery, holes are attracted TOWARDS the negative terminal of the battery.(3) Holes are transported, when there is movement of electrons.(4) The DRIFT speed of these electrons in a p-type semiconductor is less than that in an n-type semiconductor. Also the mobility of the holes is less than that of the electrons.(5) The electrical conductivity depends on the mobility of charge carriers. HENCE, the conductivity of an n-type semiconductor is greater than that of a p-type semiconductor EVEN when both of these have the same level of doping. |
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