Answer to Question #175040 in Mechanical Engineering for Varun

Question

An impurity of 0.01 ppm is added to Si. The semiconductor has a resistivity of 

0.25 ohm/m at 300 K. Calculate the hole concentration and its mobility. 

Also, comment on the result. Atomic weight of Si=28.1, density of

Si=2.4 x 103

kg/m3

.