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Problem 4: Use the table below to answer the following questions. Tempature Coefficients of Resistivity ? Material Coefficient ? (1/°C)[2] Material Coefficient ? (1/°C)[2] Conductors Conductors Silver 3.8x10-3 Manganin (Cu, Mn, Ni alloy) 0.000x10-3 Copper 3.9x10-3 Constantan (Cu, Ni alloy) 0.002x10-3 Gold 3.4x10-3 Mercury 0.89x10-3 Aluminum 3.9x10-3 Nichrome (Ni, Fe, Cr alloy) 0.4x10-3 Tungsten 4.5x10-3 Semiconductors Iron 5.0x10-3 Carbon (pure) -0.5x10-3 Platinum 3.93x10-3 Germanium (pure) -50x10-3 Lead 3.9x10-3 Silicon (pure) -70x10-3 Suppose a wire is 21 m long with a 0.15 mm diameter and has a resistance of 91 ? at 20.0°C. Part (a) What is the resistivity of the wire's material? Part (b) What is its resistance at 150°C, in ohms, if the temperature coefficient of resistivity is the same as that of gold?

          Problem 4: Use the table below to answer the following questions.
Tempature Coefficients of Resistivity ?
Material Coefficient ? (1/°C)[2] Material Coefficient ? (1/°C)[2]
Conductors Conductors
Silver 3.8x10-3 Manganin (Cu, Mn, Ni alloy) 0.000x10-3
Copper 3.9x10-3 Constantan (Cu, Ni alloy) 0.002x10-3
Gold 3.4x10-3 Mercury 0.89x10-3
Aluminum 3.9x10-3 Nichrome (Ni, Fe, Cr alloy) 0.4x10-3
Tungsten 4.5x10-3 Semiconductors
Iron 5.0x10-3 Carbon (pure) -0.5x10-3
Platinum 3.93x10-3 Germanium (pure) -50x10-3
Lead 3.9x10-3 Silicon (pure) -70x10-3

Suppose a wire is 21 m long with a 0.15 mm diameter and has a resistance of 91 ? at 20.0°C.
Part (a) What is the resistivity of the wire's material?
Part (b) What is its resistance at 150°C, in ohms, if the temperature coefficient of resistivity is the same as that of gold?

Problem 4: Use the table below to answer the following questions.
Tempature Coefficients of Resistivity ?
Material Coefficient ? (1/°C)[2] Material Coefficient ? (1/°C)[2]
Conductors Conductors
Silver 3.8x10-3 Manganin (Cu, Mn, Ni alloy) 0.000x10-3
Copper 3.9x10-3 Constantan (Cu, Ni alloy) 0.002x10-3
Gold 3.4x10-3 Mercury 0.89x10-3
Aluminum 3.9x10-3 Nichrome (Ni, Fe, Cr alloy) 0.4x10-3
Tungsten 4.5x10-3 Semiconductors
Iron 5.0x10-3 Carbon (pure) -0.5x10-3
Platinum 3.93x10-3 Germanium (pure) -50x10-3
Lead 3.9x10-3 Silicon (pure) -70x10-3

Suppose a wire is 21 m long with a 0.15 mm diameter and has a resistance of 91 ? at 20.0°C.
Part (a) What is the resistivity of the wire's material?
Part (b) What is its resistance at 150°C, in ohms, if the temperature coefficient of resistivity is the same as that of gold?

Added by Miriam A.

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