A temperature-stable resistor is made by connecting a resistor made of silicon in series with onemade of iron. If the required total resistance is 1300 Q in a wide temperature range around 20°C,what should be the resistance of the (a) silicon resistor and (b) iron resistor? (See the table below.)Resistivities of Some Materials at Room Temperature (20°C)Resistivity, p(N-m)Temperature Coefficientof Resistivity, a (K-')MaterialTypical MetalsSilver1.62 x 10-84.1 x 10-Соpper1.69 x 10-4.3 x 10-3Gold2.35 X 102.75 x 10-84.0 X 10-4.4 x 10-AluminumManganinTungstenIron4.82 x 105.25 x 10-9.68 x 10-810.6 X 10 *0.002 x 104.5 x 10-6.5 x 10-3.9 x 10PlatinumTypical Semiconductors2.5 x 108.7 x 102.8 x 10-Silicon, pure-70 x 10-3Silicon, n-typeSilicon, p-typeTyptcal Insulators10-104GlassFused quartz-10%"An alloy specincally designed to have a small value of a."Pure silicon doped with phosphorus impurities to a charge carrier density of 10 m"Pure silicon doped with aluminum impurities to a charge carrier density of 10 m(a) NumberiUnits(b) NumberiUnits

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A temperature-stable resistor is made by connecting a resistor made of silicon in series with one made of iron. If the required total resistance is 1300 Q in a wide temperature range around 20°C, what should be the resistance of the (a) silicon resistor and (b) iron resistor? (See the table below.) Resistivities of Some Materials at Room Temperature (20°C) Resistivity, p (N m) Temperature Coefficient of Resistivity, a (K-) Material Typical Metals Silver 1.62 x 10-8 4.1 x 10- Copper Gold Aluminum 1.69 x 10-8 4.3 x 10-3 2.35 x 10 4.0 x 10- 2,75 x 10-8 4.4 x 10- Manganin Tungsten Iron 4.82 x 10 8 0.002 x 10- 4.5 x 10- 5.25 x 10- 9.68 x 10-8 6.5 x 10- 3,9 x 10 Platinum 10.6 X 10* Typical Semiconductors 2.5 x 10 Silicon, pure -70 x 10-3 Silicon, n-type" Silicon, p-type 8.7 x 104 2.8 x 10- Typical Insulators 101 104 Glass Fused quartz ~10% "An alloy specifically designed to have a small value of a. "Pure silicon doped with phosphorus impurities to a charge carrier density of 10" m Pure silcon doped with aluminum impurities to a charge carrier density of 10" m. (a) Number i Units (b) Number Units

A temperature-stable resistor is made by connecting a resistor made of silicon in series with one made of iron. If the required total resistance is 1300 Q in a wide temperature range around 20°C, what should be the resistance of the (a) silicon resistor and (b) iron resistor? (See the table below.) Resistivities of Some Materials at Room Temperature (20°C) Resistivity, p (N m) Temperature Coefficient of Resistivity, a (K-) Material Typical Metals Silver 1.62 x 10-8 4.1 x 10- Copper Gold Aluminum 1.69 x 10-8 4.3 x 10-3 2.35 x 10 4.0 x 10- 2,75 x 10-8 4.4 x 10- Manganin Tungsten Iron 4.82 x 10 8 0.002 x 10- 4.5 x 10- 5.25 x 10- 9.68 x 10-8 6.5 x 10- 3,9 x 10 Platinum 10.6 X 10* Typical Semiconductors 2.5 x 10 Silicon, pure -70 x 10-3 Silicon, n-type" Silicon, p-type 8.7 x 104 2.8 x 10- Typical Insulators 101 104 Glass Fused quartz ~10% "An alloy specifically designed to have a small value of a. "Pure silicon doped with phosphorus impurities to a charge carrier density of 10" m Pure silcon doped with aluminum impurities to a charge carrier density of 10" m. (a) Number i Units (b) Number Units

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter28: Current And Resistance

Section: Chapter Questions

Problem 68PQ

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