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Electronic Devices 10th Edition by Thomas L. Floyd - Test Bank
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Test Bank For Electronic Devices 10th Edition by Thomas L. Floyd Complete Test Bank
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,ExamName___________________________________
TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false.
1) The typical barrier potential for silicon is 0.3 V. 1)
2) In the quantum model of the atom, an orbital is a discrete energy level where an electron is found. 2)
3) Silicon doped with impurities is used in the manufacture of semiconductor devices. 3)
4) A p-type semiconductor has relatively few free electrons. 4)
5) Hole flow occurs in the conduction band. 5)
6) The valence band has lower energy than he conduction band. 6)
7) The energy difference between the valence band and the conduction band in a substance is called 7)
the thermal gap.
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
8) Holes are the majority carriers in 8)
A) a p-type semiconductor B) a pn junction semiconductor
C) an n-type semiconductor D) none of the above
9) Silicon and germanium contain ________ valence electrons 9)
A) eight B) one C) four D) two
10) A semiconductor is said to be a ________ type of material 10)
A) gaseous B) liquid C) crystalline D) metallic
11) A trivalent atom is also called 11)
A) a metal B) a donor
C) an acceptor D) a semiconductor
12) An intrinsic semiconductor has 12)
A) an excess of holes B) a large number of impurities
C) an excess of electrons D) none of the above
13) Conduction in the conduction band of semiconductors is by the movement of 13)
A) holes B) electrons
C) both electrons and holes D) none of the above
14) The process of a conduction electron falling into a hole is called 14)
A) falling B) ionization C) recombination D) merging
1
,15) In a pn junction, the layers where there are few charges near the junction is called the 15)
A) valence region B) conductive region
C) depletion region D) boundary region
16) The majority carrier in a p-type semiconductor is 16)
A) holes B) ions C) electrons D) protons
17) The type of chemical bond that occurs in copper is 17)
A) covalent B) ionic C) crystalline D) metallic
18) Electrons orbiting the nucleus of an atom are grouped into energy bands known as 18)
A) tracks B) layers C) elevations D) shells
19) The following are all semiconductors except 19)
A) gallium arsenide B) copper
C) silicon D) germanium
20) Raising the temperature of an intrinsic semiconductor will 20)
A) increase free electrons
B) there is no effect on free electrons
C) decrease free electrons
21) The energy required to cause a valence electron to escape from the atom's influence is called the 21)
A) potential energy B) ionization energy
C) break-away energy D) free energy
2
, Answer Key
Testname: UNTITLED1
1) FALSE
2) FALSE
3) TRUE
4) TRUE
5) FALSE
6) TRUE
7) FALSE
8) A
9) C
10) C
11) C
12) D
13) B
14) C
15) C
16) A
17) D
18) D
19) B
20) A
21) B
3
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