1-29. A material which has an equal number of
electron-hole pairs and conducting
electrons is known as what type of
1-30. The process of adding impurities to crystals
is known by which of the following terms?
1-31. When doping increases the number of free
electrons in a semiconductor, what type of
impurity has been added?
1-32. The semiconductor doping impurities
arsenic, antimony, and bismuthare
classified as what type of impurities?
1-33. In the P-type semiconductor, what are the
1. The electrons
2. The holes
3. The inactive atoms
4. The inert atoms
1-34. What is/are the purpose(s) of the PN
1. To rectify only
2. To amplify only
3. To rectify and amplify
4. To switch
1-35. In a schematic diagram of a PN junction
diode, which of the following symbols
represents the cathode (N-type material)?
1. The arrow
2. The circle
3. The vertical bar
4. The horizontal line
1-36. Which of the following alphanumerical
codes correctly identifies the diode, crystal
rectifier number 3, in a circuit?
1-37. Which of the following is the schematic
symbol of the PN junction diode?
1-38. The placing of an impurity on a
semiconductor of the opposite impurity and
fusing the two together produce what type
of semiconductor junction?
1. Grown junction
2. Alloy Junction
3. Barrier junction
4. Intrinsic junction