3 WA 017 A copper wire has a resistance of 0.455 2 at 20.0°C, and an...
A copper wire has a resistance of 0.500 Ω at 20.0°C, and an iron wire has a resistance of 0.520 Ω at the same temperature. At what temperature are their resistances equal? The temperature coefficient of resistivity for copper is 3.90 *10^-3(°C)−1 and for iron it is 5.00 *10^-3(°C)−1.
A copper wire has a resistance of 0.525 at 20.0°C, and an iron wire has a resistance of 0.545 at the same temperature. At what temperature are their resistances equal?
The resistance of a 1.50 m long copper wire, with a cross-sectional area of 7.06 x 10-6 m2, is measured at different temperatures starting at 20.0 oC and ending at 70.0 oC. The given table shows those resistances as a function of temperature differences from the initial temperature. Generate an accurate plot of the resistance as a function of DT. Determine the resistivity of copper from your plot and compare to the accepted value for copper’s resistivity. Determine the temperature...
A copper wire has a resistance of 9.00 ohms at 33.0 degrees. Determine the resistance (in ohm) at 433 degrees celsius. The temperature coefficient of resistivity for copper wire is 3.90*10^-3 degrees celsius to the negative one power. (Assume that the temperarure coefficient of resistivity was measured using the reference temperature 20 degrees celsius.)
A given copper wire has a resistance of 5.05 Ω at 20.0°C while a tungsten wire of the same diameter has a resistance of 4.69 Ω at 20.0°C. At what temperature will the two wires have the same resistance? Your response differs from the correct answer by more than 10%. Double check your calculations.°C
2. (20 points) A copper wire with a square cross-section (side length 5 of 3.00 A. The two wires are parallel over a region of 20.0 cm, where they are 1.60 cm apa produces a magnetic field on the copper wire. The copper wire is conn current directed rightward. Data of copper: resistivity = 1.68 x 10-8 Ωm; free electron number density-8.50 x 1028/㎡ a. What is the magnetic field the iron wire exert on the copper wire? (For this...
How to do these two problems 3. -1 points OSColPhys2016 20.1.WA.008 My Notes Consider a copper wire with a diameter of 2.51 mm. (a) What is the drift speed of the electrons in the copper wire when a current of 11.0 A flows through it? Assume that each copper atom contributes one free electron to the metal. The density of copper is 8.92 g/cm3 m/s (b) How does this drift speed compare to the random rms speed of an electron...
An aluminum wire has a resistance of 3.00 2 at 31.0°C. Determine its resistance (in 2) at 431°C. The temperature coefficient of resistivity for aluminum wire is 3.90 x 10-3 (°C)-1. (Assume that the temperature coefficient of resistivity was measured using the reference temperature 20°C.)
(a) A 34.1-m length of copper wire at 20.0°C has a radius of 0.31 mm. If a potential difference of 7.0 V is applied across the length of the wire, determine the current in the wire. (Use the values in the following table.) Resistivities and Temperature Coefficients of Resistivity for Various Materials (at 20°C) Material Resistivity (Ω · m) Temperature Coefficient of Resistivity [(°C)−1] Silver 1.59 ✕ 10−8 3.8 ✕ 10−3 Copper 1.7 ✕ 10−8 3.9 ✕ 10−3 Gold 2.44...
(a) To what temperature (in °C) must you raise a copper wire, originally at 20.0°C, to triple its resistance, neglecting any changes in dimensions? oC (b) Does this happen in household wiring under ordinary circumstances? O Yes O No