784_Physics ProblemsTechnical Physics

784_Physics ProblemsTechnical Physics - 124 Current and...

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124 Current and Resistance Therefore 12 0 0 1 0 0 +′ ° = −° α . . C C af which simplifies to ′ = 0 0 .C . From this, the temperature coefficient, based on a reference temperature of 0°C, may be computed for any material. For example, using this, Table 27.1 becomes at 0 C ° : Material Temp Coefficients at 0°C Silver 41 10 3 . ×° C Copper 42 10 3 . C Gold 36 10 3 . C Aluminum 3 . C Tungsten 49 10 3 . C Iron 56 10 3 . C Platinum 425 10 3 . C Lead 3 . C Nichrome 04 10 3 . C Carbon −× ° 05 10 3 Germanium ° 24 10 3 C Silicon ° 30 10 3 C P27.68 (a) A thin cylindrical shell of radius r , thickness dr , and length
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This note was uploaded on 12/14/2011 for the course PHY 203 taught by Professor Staff during the Fall '11 term at Indiana State University .

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