31-40

Question 1

31. Which of the following is created when trivalent impurities are added to a semiconductor?

Answer 1

B. Holes

Question 2

32. Which of the following does a hole in the semiconductor define?

Answer 2

D. An incomplete part of an electron pair.

Question 3

33. An electron and a hole in a close proximity would tend to

Answer 3

D. destroy each other

Question 4

34. Which of the following does the resistivity of semiconductor depend upon?

Answer 4

B. Atomic nature of the semi conductor

Question 5

35. Intrinsic semiconductors are those

Answer 5

A. which are made of semiconductor material in its purest form

Question 6

36. A pure semiconductor behaves like an insulator at 0 deg. K because

Answer 6

C. Free electrons are not available for current condition.

Question 7

37. The energy gap is much more in silicon than in germanium because

Answer 7

D. Its valence electrons are more tightly bound to their nuclei

Question 8

38. A P-type semi conductor result when

Answer 8

B. A trivalent impurity is added to an intrinsic semiconductor

Question 9

39. An intrinsic semiconductor at absolute zero

Answer 9

B. behaves like an insulator

Question 10

40. A semiconductor has temperature co-efficient of resistance.

Answer 10

C. negative