
Chapter 1 (Semicon) - Floyd
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University
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Queenie Amargo
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39 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Each atom in a silicon crystal has
Four valence electrons
Four conduction electrons
Eight valence electrons, four of its own and four shared
No valence electrons because all are shared with other atoms
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1. An atom consists of
a. One nucleus and only one electron
b. One nucleus and one or more electrons
c. Protons, electrons and neutrons
d. Answers (b) and (c)
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Recombination is when
An electron falls into a hole
A positive and a negative ion bond together
A valence electron becomes a conduction electron
A crystal is formed
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In an intrinsic semiconductor,
There are no free electrons
The free electrons are thermally produced
There are only holes
There are as many electrons as there are holes
Answers (b) and (d)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The purpose of a pentavalent impurity is to
Reduce the conductivity of silicon
Increase the number of holes
Increase the number of free electrons
Create minority carriers
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The majority carriers in an n-type semiconductor are
Holes
Valence electrons
Conduction electrons
Protons
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Holes in an n-type semiconductor are
Minority carriers that are thermally produced
Minority carriers are produced by doping
Majority carriers that are thermally produced
Majority carriers are produced by doping
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