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4.1) Si piece is doped with As at concentration 1017cm3 and it is 100m long, 10m wide and 1m thick. Calculate the resistance of this

4.1) Si piece is doped with As at concentration 1017cm3 and it is 100m long, 10m wide and 1m thick. Calculate the resistance of this sample when contacted one each end. 4.2) If the scattering time for electrons and holes is the same in Si, what is the ratio of their mobilities

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