Q.

Find the conductivity of intrinsic Silicon at 300 K. It is given that ni at 300 K in Silicon is 1.5×1010 cm-3 and the mobilities of electrons and holes in Silicon are 1300 cm2 V-1s-1 and 500 cm2/ V-s respectively

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a

4.32×10-6 mho/cm

b

2.32×10-5 mho/cm

c

3.42×10-8 mho/cm

d

1.32×10-5 ohm/cm

answer is A.

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Detailed Solution

conductivity of a semiconductor is σ=nieμe+μh  where ni= the intrinsic carrier density and   μe and μh is the mobility of the electons and holes respectively here, σ=1.5×1010×1.6×10-191300+500σ=4.32×10-6 ohm-1cm-1
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Find the conductivity of intrinsic Silicon at 300 K. It is given that ni at 300 K in Silicon is 1.5×1010 cm-3 and the mobilities of electrons and holes in Silicon are 1300 cm2 V-1s-1 and 500 cm2/ V-s respectively