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What is the resistance (in Ω) of a 35.0 m long piece of 13 gauge copper wire having a 1.828 mm diameter?
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- What is the resistance (in Ω) of a 34.5 m long piece of 16 gauge copper wire having a 1.291 mm diameter?A coil of fine copper wire has a resistance of 6.4-Ω and a total mass is 15.1 g. What is the diameter d of the wire and what is its length L? (The density of copper is 8.96 g/cm3.) D= IN MM ?? L= IN M ??An electrician wishes to cut a copper wire (ρ=1.72×10-8 Ωm) that has 10Ω of resistance. The wire has a radius of 0.625mm. Approximately what length of wire has a resistance equal to the maximum 10Ω ? The length of the copper wire having a resistance of 10Ω is =
- The length of a 200 m lead wire has a resistance of 1.7 Ω. If the cross section of this wire is 3.0 × 10 -6 m 2, of what material the conductor is it made up?The given diagram depicts a gold wire and a silver wire that are soldered together and have the same length of 60.0 cm. Both wires have a diameter of 2.00 mm. Compute the equivalent resistance of the combination between the free ends A and B. 40.0 cm A Gold wire (60.0 cm length, diameter 2.00 mm) Silver wire (60.0 cm length, diameter 2.00 mm) BA length of copper wire has a resistance 24 Ω. The wire is cut into three pieces of equal length, which are then connected as parallel lengths between points A and B. What resistance will this new “wire” of length L0 3 have between points A and B? Answer in units of Ω.
- What is the resistance of a 6.8 m length of nichrome wire that has a radius of 0.321 mm? How much current does it carry when connected to a 120 V source? R = Ω I = AA battery has an emf of ε = 19 V, an internal resistance r = 28 22, and is connected to a resistor of R = 75 22. Express the current I through the circuit in terms of ε, r and R. Calculate the numerical value of I in A. Express the terminal voltage 4V of the battery in terms of I and R. Calculate the numerical value of 4V in V.A coaxial cable consists of an inner conductor with radius ri = 0.25 cm and an outer radius of ro = 0.5 cm and has a length of 10 meters. Plastic, with a resistivity of ρ = 2.00 × 1013 Ω · m , separates the two conductors. What is the resistance of the cable?
- An extension cord has a resistivity of p = 7.5 x 10-8 Ω.m. The cord is made from copper wire with a diameter D = 0.45 cm and it is L = 9.9 m long. (a) What is the resistance in ohms? R = (b) If a current of I= 2.95 A passes through the wire what voltage is the cord connected to, in volts? V=A cylindrical aluminum pipe of length 1.41 m has an inner radius of 1.72 ×10-3 m and an outer radius of 3.10 ×10-3 m. The interior of the pipe is completely filled with copper. What is the resistance of this unit? (Hint: Imagine that the pipe is connected between the terminals of a battery and decide whether the aluminum and copper parts of the pipe are in series or in parallel.)A battery with terminal voltage ΔV = 2.6 V contains E = 2.6 kJ of energy. It is connected to a P = 9.5 W light bulb. Find an expression for the light bulb's resistance, R. What is the resistance in ohms? Assuming the voltage remains constant, how long will the battery last in seconds?