Current Electricity and Electrical InstrumentHard
Question
A potential difference of 2V is applied between the opposite faces of a Ge crystal plant of area 1 cm2 and thickness 0.5 mm. If the concentration of electron in Ge is 2 × 1019/m2 and mobilities of electrons and holes are 0.36 
and 0.14 
respectively, then the current flowing through the plate will be -
and 0.14 respectively, then the current flowing through the plate will be -Options
A.0.25 A
B.0.45 A
C.0.56 A
D.0.64 A
Solution
σ = ne(μe + μh)
= 2 × 1019 × 1.6 × 10-19(0.36 + 0.14)
= 1.6(Ω-m)-1
R = ρ
Ω
∴ i =
A = 0.64A
= 2 × 1019 × 1.6 × 10-19(0.36 + 0.14)
= 1.6(Ω-m)-1
R = ρ
Ω∴ i =
A = 0.64ACreate a free account to view solution
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