Engineering Physics

Review Questions

1. Derive the continuity equation for conduction electrons.

    

   (Set-4–June 2005), (Set-2–May 2004)

2. Derive an expression for the density of holes in the valence band of an intrinsic semiconductor.

    

   (Set-1–Sept. 2008), (Set-1–Sept. 2007), (Set-2–Sept. 2006), (Set-1–May 2003)

3. Explain Hall effect. Show that for a n-type semiconductor the Hall coefficient .

    

   (Set-1–May 2004), (Set-2–May 2003)

4. Explain the effect of temperature and dopent on the Fermi level in a semiconductor.

    

   (Set-2–May 2003)

5. Describe the drift and diffusion currents in a semiconductor. Derive their expressions and deduce Einstein’s relation.

    

   (Set-1–May 2006), (Set-4–Nov. ...