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85. We denote silicon with subscript
s
and iron with
i
. Let
T
0
= 20°. If
() () () ( ) ( ) (
)(
)
() ( )
()
00
0
0
0
0
11
temperature independent terms
si
s
i
i
ss
i
i
R
TR
T
T
T
R
T
T
T
RT
αα
=+=
+
−
+
+
−
⎡
⎤⎡
⎤
⎣
⎦⎣
⎦
=+
+
is to be temperatureindependent, we must require that
R
s
(
T
0
)
α
s
+
R
i
(
T
0
)
i
= 0. Also note
that
R
s
(
T
0
) +
R
i
(
T
0
) =
R
= 1000
Ω
. We solve for
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This note was uploaded on 06/03/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.
 Spring '08
 Any
 Physics

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