problem 1) What are Vander Walls forces?

problem 2) Describe recombination and trapping process.

problem 3) State diode recovery time in forward and backward modes.

problem 4) prepare a detailed note on diode resistance.

problem 5) Describe briefly the working of an NPN transistor.

problem 6) Describe the following terms for CC Configuration.

(a) Current amplifications factor.

(b) Input resistance.

(c) Output resistance.

(d) Voltage gain.

problem 7) prepare a brief note on photo transistor.

problem 8) prepare brief notes on Gunn diode.

problem 9) Describe the theory of Hall effect and Hall field.

problem 10) Describe the principle, working construction and characteristics of zener diode.

problem 11) Describe the different types of bonds in metal, semiconductors and insulators.

problem 12) Derive the expression for Barrier potential and width of depletion region.

problem 13) Describe and draw the characteristics of CB configuration.

problem 14) Describe the classification and fabrication of FET.

problem 15) Describe the principle, construction and working of a Lasser diode.

problem 16) prepare brief notes on:

(a) LCD.

(b) LDR.