1. What is the resistance at normal room temperature of 60 m of copper wire having a diameter of 0.64 mm? (r copper = 1.7241 X 10^-8 at 20 C)
2. A semi-circular copper conductor has an inner radius of 60 cm, an axial thickness of 4 cm and a radial thickness of 3 cm. Determine the resistance of this conductor between its two end contact faces at 70 C
1. What is the resistance at normal room temperature of 60 m of copper wire having...
7. A copper wire has a resistance of 4.75 at room temperature. What is the wire’s resistance at 86.4 °C?
An 80 cm long wire is made by welding a 1.8 mm diameter, 20 cm long copper wire to a 1.8 mm diameter, 60 cm long iron wire at normal room temperature (20 ∘C). When two wires are connected end to end, their resistances add together. The resistivity of copper is 1.68×10−8Ωm and the of iron is 1.00×10−7Ωm. The temperature coefficients are: copper = 0.0039/∘C and iron = 0.0050/∘C. What is the resistance of the copper section of wire?
An 80 cm long wire is made by welding a 1.8 mm diameter, 20 cm long copper wire to a 1.8 mm diameter, 60 cm long iron wire at normal room temperature (20 ∘C). When two wires are connected end to end, their resistances add together. The resistivity of copper is 1.68×10−8Ωm and the of iron is 1.00×10−7Ωm. The temperature coefficients are: copper = 0.0039/∘C and iron = 0.0050/∘C. What is the resistance of the iron section of wire?
The resistance of a copper wire is 25m Ohm (mili not mega) at a temperature of 70 F a) what is the resistance if the temperature drops from 70 F to 60 F
Now let’s see how temperature affects the resistance of copper wire. A length of 18 gauge copper wire with a diameter of 1.02 mm and a cross-sectional area of 8.20×10−7 m2 has a resistance of 1.02 Ω at a temperature of 20 ∘C. Find the resistance at 0 ∘C and at 100 ∘C. The temperature coefficient of resistivity of copper is 0.0039 (C∘)−1. On a hot summer day in Death Valley, the resistance is 1.15 Ω. What is the temperature?
What is the resistance of A) A 0.800 m long copper wire that is 0.700 mm in diameter? B) A 90.0 cm long piece of carbon with a 0.500 mm × 0.500 mm square cross section?
What is the resistance of a. A 1.60 m long copper wire that is 0.600 mm in diameter? b. A 70.0 cm long piece of carbon with a 1.60 mm × 1.60 mm square cross section?
500 turns of insulated 18-gauge copper wire (diameter 1.024 mm) are wound in a single layer on a cylindrical form of diameter 10.00 cm. What is the resistance of the coil? (Hint: Take into account the thickness of the wire when calculating the radius of a single turn.)
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Part A What is the resistance of a 1.5-m-long copper wire that is 0.30 mm in diameter? Submit My Answers Give Up Part B What is the resistance of a 10-cm-long piece of iron with a 1.5 mm x 1.5 mm square cross section? Express your answer using two significant figures Submit My Answers Give Up
Problem 18.13 Part A What is the resistance of a 4.4-m length of copper wire 1.7 mm in diameter? The resistivity of copper is 1.68×10−8Ω⋅m. ------------------------------------------------------------------------------------------------------------ Problem 18.22 Part A Determine at what temperature aluminum will have the same resistivity as tungsten does at 24 ∘ C . please help thank you