Electronic Devices and Circuits

Q1: A sample of N-type semiconductor has electron density of 6.25 x 1018/cm3 at 300k. If the intrinsic concentration of carriers in this sample is 2.5 x 1013/cm3 at this temperature the hole density works out to be

A 106/cm3

B 108/cm3

C 1010/cm3

D 10l2/cm3

ANS:B - 108/cm3

Ni^2 = Ne*Np.

Np = Ni^2 / Ne,
Np = (2.5x10^13)^2 / 6.25x10^18,
Np = 10^8.



img not found
img

For help Students Orientation
Mcqs Questions

One stop destination for examination, preparation, recruitment, and more. Specially designed online test to solve all your preparation worries. Go wherever you want to and practice whenever you want, using the online test platform.