PEI EXAM 1 UPDATED ACTUAL QUESTIONS AND
CORRECT ANSWERS
Question:
1. (T/F) All academic misconduct, including "minor" and first-time offences will be reported to the Dean
Answer:
T
Question:
2. How many valence electrons do germanium atoms have?
Answer:
4
Question:
3. Type all the elemental semiconductor materials from list: (Ge, Doped Si, Si, SiC, GaAs, Doped Ge,
GaP)
Answer:
Ge, Doped Si, Si, Doped Ge
Question:
4. (T/F) Both n- and p-material are electrically neutral. The "n" and "p" designations merely refer to the
dominant type of charge carriers in the material
Answer:
T
Question:
5. (T/F) Intrinsic semiconductor material has no charge, but doped semiconductor materials have charge
according to their type: p-type has positive charge and n-type has negative charge
Answer:
F
Question:
6. What type of atoms are added to molten silicon in order to create p-type semiconductor material?
Answer:
Trivalent
Question:
7. What type of atoms are added to molten silicon in order to increase the number of free electrons?
Answer:
Pentavalent
Question:
8. Silicon is doped with boron atoms. Is this n- or p-type silicon?
Answer:
p
, Question:
9. Silicon is doped with arsenic atoms. Is this n- or p-type silicon?
Answer:
n
Question:
10. (T/F) Holes are less mobile than electrons and in an applied electric field they experience a force in the
same direction as the field
Answer:
T
Question:
11. (T/F) An intrinsic semiconductor has an equal number of free electrons and holes.
Answer:
T
Question:
12. (T/F) The electrical resistance of n-type semiconductor decreases with increasing temperature
Answer:
T
Question:
13. What is the correct units for the term q/kT, which often appears in equations that describe
semiconductor materials and components?
Answer:
V^-1
Question:
14. (T/F) The so-called thermal voltage in semiconductor theory increases with increasing temperature.
Answer:
T
Question:
15. When looking at the forbidden bandgap, is the conduction band on top or on bottom?
Answer:
Top
Question:
16. (T/F) Holes travel in the opposite direction of the electric field.
Answer:
F
Question:
17. The majority carrier of an n-type semiconductor.
Answer:
Electrons
CORRECT ANSWERS
Question:
1. (T/F) All academic misconduct, including "minor" and first-time offences will be reported to the Dean
Answer:
T
Question:
2. How many valence electrons do germanium atoms have?
Answer:
4
Question:
3. Type all the elemental semiconductor materials from list: (Ge, Doped Si, Si, SiC, GaAs, Doped Ge,
GaP)
Answer:
Ge, Doped Si, Si, Doped Ge
Question:
4. (T/F) Both n- and p-material are electrically neutral. The "n" and "p" designations merely refer to the
dominant type of charge carriers in the material
Answer:
T
Question:
5. (T/F) Intrinsic semiconductor material has no charge, but doped semiconductor materials have charge
according to their type: p-type has positive charge and n-type has negative charge
Answer:
F
Question:
6. What type of atoms are added to molten silicon in order to create p-type semiconductor material?
Answer:
Trivalent
Question:
7. What type of atoms are added to molten silicon in order to increase the number of free electrons?
Answer:
Pentavalent
Question:
8. Silicon is doped with boron atoms. Is this n- or p-type silicon?
Answer:
p
, Question:
9. Silicon is doped with arsenic atoms. Is this n- or p-type silicon?
Answer:
n
Question:
10. (T/F) Holes are less mobile than electrons and in an applied electric field they experience a force in the
same direction as the field
Answer:
T
Question:
11. (T/F) An intrinsic semiconductor has an equal number of free electrons and holes.
Answer:
T
Question:
12. (T/F) The electrical resistance of n-type semiconductor decreases with increasing temperature
Answer:
T
Question:
13. What is the correct units for the term q/kT, which often appears in equations that describe
semiconductor materials and components?
Answer:
V^-1
Question:
14. (T/F) The so-called thermal voltage in semiconductor theory increases with increasing temperature.
Answer:
T
Question:
15. When looking at the forbidden bandgap, is the conduction band on top or on bottom?
Answer:
Top
Question:
16. (T/F) Holes travel in the opposite direction of the electric field.
Answer:
F
Question:
17. The majority carrier of an n-type semiconductor.
Answer:
Electrons
