1. Write the expression for the concentration of electrons in the conduction band of an intrinsic semiconductor.
2. . Write the expression for the concentration of electrons in the valence band of an intrinsic semiconductor.
3. What is Fermi level in a semiconductor?
4. Write the expression for electrical conductivity of an intrinsic semiconductor.
5. What is meant by doping?
6.Explain the concept of hole in semiconductor.
7. Write an expression for carrier concentration in n-type semiconductor.
8. Write an expression for carrier concentration of holes in the valence band of p-type semiconductor.
9. Explain the variation of Fermi level with temperature in the case of p-type semiconductor and n-type semiconductor.
10. Define Fermi level in the case of semiconductors. Mention its position in intrinsic and extrinsic semiconductors at 0K.
11. Define Hall effect and Hall voltage.
12. Mention any four applications of Hall effect.