4- The molecular weight of tungsten is 183.84 gr/mol, ts density is 19.25 gr/cm3, the resistivity of tungsten at 20 °C is 5.6x10-8 Qm and its a coefficient is 0.0045 °C-1. Since tungsten has 2 free electrons (ē) per current- carrying atom, a-) Find the drift velocity of electrons in a tungsten wire of 18 m length, 6 mm radius and 80 mA current at 20 °C. b-) Find the current density (1), conductivity (0), electric field in the wire (E) and resistance (R20). -) Find the resistance of this wire at 1080°C (R1080°c).
4- The molecular weight of tungsten is 183.84 gr/mol, ts density is 19.25 gr/cm3, the resistivity of tungsten at 20 °C is 5.6x10-8 Qm and its a coefficient is 0.0045 °C-1. Since tungsten has 2 free electrons (ē) per current- carrying atom, a-) Find the drift velocity of electrons in a tungsten wire of 18 m length, 6 mm radius and 80 mA current at 20 °C. b-) Find the current density (1), conductivity (0), electric field in the wire (E) and resistance (R20). -) Find the resistance of this wire at 1080°C (R1080°c).
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
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Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Transcribed Image Text:4- The molecular weight of tungsten is 183.84 gr/mol,
its density is 19.25 gr/cm3, the resistivity of tungsten at
20 °C is 5.6x10-8 m and its a coefficient is 0.0045 °C-1.
Since tungsten has 2 free electrons (ē) per current-
carrying atom,
a-) Find the drift velocity of electrons in a tungsten wire
of 18 m length, 6 mm radius and 80 mA current at 20 °C.
b-) Find the current density (J), conductivity (0), electric
field in the wire (E) and resistance (R20).
c-) Find the resistance of this wire at 1080°C (R1080°c).
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