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Question 4 (30 marks) Given two Si samples A and B. Sample A doped with 5 x10 phosphorous atoms/cm ; Sample B doped with 10

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Question 4 (30 marks) Given two Si samples A and B. Sample A doped with 5 x10" phosphorous atoms/cm ; Sample B doped with 10" boron atoms/cm 3. (a) State the type of semiconductor for sample A and sample B. Justify your answer. [6 marks] (b) Find the majority and minority carrier concentration at 300 K for sample A. [7 marks] (c) Find the majority and minority carrier concentration at 300 K for sample B. [7 marks]

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