Electronic Devices and Circuits - Engineering

Q1:

A-P type material has an acceptor ion concentration of 1 x 1016 per cm3. Its intrinsic carrier concentration is 1.48 x 1010/ cm. The hole and electron mobilities are 0.05m2/V-sec and 0.13 m2/V-sec respectively calculate the resistivity of the material

A 12.5 Ω-cm

B 1.25 Ω-cm

C 0.125 Ω-cm

D 125 Ω-cm

ANS:B - 1.25 Ω-cm

1/σ.

1/e(A+B).
A=acceptor concentration x hole mobility.
B=carrier concentration x electron mobility.

Note: units should be consistent (cm).