And gaas and alp the data table
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7 | Composition (at% Zn) | Questions and Problems | ● | 395 | ||||
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10 | 20 | 30 | |||||||
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6 |
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4 |
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10 | 20 | 30 | 40 |
are 1.5 free electrons per gold atom. The electrical conductivity and density for Au | ||||||
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are 4.3 � 107(�-m)�1and 19.32 g/cm3, re- | this alloy given the following data: | |||||
spectively. (b) Now compute the electron | ||||||
Electrical | ||||||
12.15 | ||||||
From Figure 12.35, estimate the value of A in Equation 12.11 for zinc as an impurity | ||||||
Phase |
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12.16 |
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� | 1.88 � 10�8 | 8.94 | ||
(a) Using the data in Figure 12.8, determine | � | 5.32 � 10�7 | 8.25 | |||
the values of �0 and a from Equation 12.10 for pure copper. Take the temperature T | 12.19 | The room-temperature electrical resistivit-ies of pure lead and pure tin are 2.06 � | ||||
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Figure 12.8. (c) Using the results of parts a and b, estimate the electrical resistivity of | ||||||
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12.17 | ||||||
Determine the electrical conductivity of a | ||||||
Cu-Ni alloy that has a yield strength of 125 | ||||||
MPa (18,000 psi). You will find Figure | ||||||
12.18 |
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Tin bronze has a composition of 92 wt% Cu and 8 wt% Sn, and consists of two phases | ||||||
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at room temperature: an � phase, which is copper containing a very small amount of | ||||||
tin in solid solution, and an � phase, which |
396 | ● | 12.27 | ||||
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12.21 |
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12.28 | ||||
tion involving an acceptor impurity atom. | ||||||
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12.22 | ||||||
N | Si | |||||
B | Ge | |||||
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(12.38) | |||||
Zn | GaAs | |||||
S | InSb | |||||
In | CdS | |||||
As | ZnTe | |||||
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12.29 | |||||
12.23 | 12.30 | |||||
Thus, a plot of the intrinsic ln n (or ln p) | ||||||
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12.24 | 12.31 | |||||
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12.25 |
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For each of the following pairs of semicon- | ||||||
ductors, decide which will have the smaller | ||||||
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12.26 | 12.32 |
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free electrons in numbers in excess of those | ||||||
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