Calculate the and resistance for the diode fig

4. In your own words, define semiconductor, resistivity, bulk resistance, and ohmic contact resis- tance.

5. (a) Using Table 1.1, determine the resistance of a silicon sample having an area of 1 cm2and a length of 3 cm.

7. In your own words, define an intrinsic material, a negative temperature coefficient, and cova- lent bonding.

8. Consult your reference library and list three materials that have a negative temperature coeffi- cient and three that have a positive temperature coefficient.

§ 1.5 Extrinsic Materials—n- and p-Type

12. Describe the difference between n-type and p-type semiconductor materials.

17. Consult your reference library and find another explanation of hole versus electron flow. Us- ing both descriptions, describe in your own words the process of hole conduction.

§ 1.6 Semiconductor Diode

p n

(b) What is the value of y � exat x � 0?

(c) Based on the results of part (b), why is the factor �1 important in Eq. (1.4)?

27. Determine the static or dc resistance of the commercially available diode of Fig. 1.19 at a for- ward current of 2 mA.

28. Repeat Problem 26 at a forward current of 15 mA and compare results.

31. Calculate the dc and ac resistance for the diode of Fig. 1.29 at a forward current of 10 mA and compare their magnitudes.

32. Using Eq. (1.6), determine the ac resistance at a current of 1 mA and 15 mA for the diode of Fig. 1.29. Compare the solutions and develop a general conclusion regarding the ac resistance and increasing levels of diode current.

36. Find the piecewise-linear equivalent circuit for the diode of Fig. 1.19. Use a straight line seg-ment that intersects the horizontal axis at 0.7 V and best approximates the curve for the region greater than 0.7 V.

37. Repeat Problem 36 for the diode of Fig. 1.29.