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The bandgap of Germanium and Silicon are 0.67eV and 1.11eV, respectively.  How do you expect the conductivity of pure Ge to compare with that of pure Si at the same finite temperature?

Si has an atomic number of 14.  This means it has 4 electrons in its valence shell (the 3rd shell).  How many other Si atoms does each Si atom bond with to form solid Si?

Semiconductors exhibit resisitivities that fall between those of conductors and insulators.  Typical resistivity ranges for semiconductors are:

Dopants are added carefully to Si to make it an extrinsic semiconductor.  Which elements can be used as dopants for Si?

The majority charge carrier in p-type extrinsic semiconductor Si in the extrinsic regime are

Question 2 (cont.)

(c) Calculate the displacement current.

Question 2 (cont.)

(b)  

Question 2

A virtual circular loop (with radius 0.2 m) lies on the screen. There is a uniform electric field everywhere on the screen, pointing out of the screen at 45 degrees relative to the screen. The magnitude of the electric field changes with time as 5t N/C, where t is time.

(a) Calculate the electric flux through the loop at t = 2 sec.