Physics Principles and Problems 2009

Section 29.1 : Conduction in Solids

Self-Check Quizzes

1
A semiconductor can amplify a weak electrical signal through electron movement in a _____.
A)liquid
B)crystalline material
C)vacuum
D)band gap
2
A material with a relatively large gap between its valence band and conduction band would be expected to be _____.
A)a good conductor
B)easily melted
C)a poor conductor
D)in the liquid state
3
Why doesn't current flow well in insulators?
A)The forbidden gap is too large.
B)They have too many electrons in their valance band.
C)There is no electric current placed across them.
D)They are usually in a liquid.
4
What are dopants used for?
A)to increase the conductivity of extrinsic semiconductors
B)to increase the heat generated by semiconductors
C)to increase the conductivity of intrinsic semiconductors
D)to decrease the heat generated by semiconductors
5
How is conduction increased in an n-type semiconductor?
A)by increased applied electrical field
B)by decreased applied electrical field
C)by the availability of extra holes
D)by the availability of donor electrons
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