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Electronic Devices and Circuits

Q1:

If a sample of germanium and a sample of Si have the impurity density and are kept at room temperature then

A both will have equal value of resistivity

B both will have equal -ve resistivity

C resistivity of germanium will be higher than that of silicon

D resistivity of Si will be higher than of germanium

ANS:D - resistivity of Si will be higher than of germanium

Since the majority of charge carrier is better in Ge than in Si, for the same concentration of charge carriers, the conductivity of Ge is higher than that of Si.



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