Question

An N-type germanium crystal has a current density of 100 A/m2

. The

crystal has a resistively of 0.5 Ω-m and electron mobility of 0.4m2

/v-s.

Calculate the drift velocity and the time taken by the electron to travel
10 mm in the crystal.​

Answer 1

Answer:

j=σE=nev

d

σ=ne

E

v

d

=neμ

σ

1

=ρ=

n

e

eμ

e

1

=

10

19

×1.6×10

−19

×1.6

1

=0.4Ωm