resistance of copper wire
R 1= rho L/A = 1.68 * 10^-8 ( 1 m)/ pi ( 0.5 * 10^-3 m)^2 = 2.14 * 10^-2 ohm
for 2 m
R2 = rho L/A = 1.68 * 10^-8 ( 2 m)/ pi ( 0.5 * 10^-3 m)^2 = 4.266 * 10^-2 ohm
delR/R = R2-R1/R1 = 4.266 * 10^-2 ohm- 2.14 * 10^-2 ohm/ 2.14 * 10^-2 ohm = 1.0
for aluminumum wire
R 1= rho L/A = 2.65 * 10^-8 ( 1 m)/ pi ( 0.5 * 10^-3 m)^2 = 3.36 * 10^-2 ohm
for 2 m
R2 = rho L/A = 2.65 * 10^-8 ( 2 m)/ pi ( 0.5 * 10^-3 m)^2 = 6.73 * 10^-2 ohm
delR/R = R2-R1/R1 = 6.73 * 10^-2 ohm- 3.36 * 10^-2 ohm/ 3.36 * 10^-2 ohm =1.0
1 m copper wire with a radius of 0.5mm and resistance R is stretched to a...
1. A ductile metal wire has resistance R. Then the wire is stretched to three times its original(poin) length. The stretching shrinks the diameter of the wire, but does not affect its density or resistivity. What is the resistance of the stretched wire? O3R 2. A current of 1.50 A flows through the leads of an electric appliance. How long does it take for (1 point) 7.50 C of charge to pass through the leads? 0 2.00s 11.0 s 6.00s...
A particular application requires a 10 m length of aluminum wire to have a resistance 0.40 mΩ at 20∘C. If the resistance of the wire cannot vary by more than ± 7.5 % from its value at 20 ∘C, to what operating temperature range should it be restricted? What would be the operating range if the wire were, instead, made of copper?
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
A 62.5 m length of insulated copper wire is wound to form a solenoid of radius 2.3 cm. The copper wire has a radius of 0.51mm. (Assume the resistivity of copper is ρ = 1.7 ✕ 10−8 Ω · m.) (a) What is the resistance of the wire? Ω (b) Treating each turn of the solenoid as a circle, how many turns can be made with the wire? turns (c) How long is the resulting solenoid? m (d) What is...
A 62.5 m length of insulated copper wire is wound to form a solenoid of radius 2.3 cm. The copper wire has a radius of 0.51mm. (Assume the resistivity of copper is ρ = 1.7 ✕ 10−8 Ω · m.) (a) What is the resistance of the wire? Ω (b) Treating each turn of the solenoid as a circle, how many turns can be made with the wire? turns (c) How long is the resulting solenoid? m (d) What is...
3. Copper wire #1 has a length L and a radius b. Copper wire #2 has a length 2L and a radius 2b. Which statement is true? (a) The total resistance of wire #1 is twice as high as that of wire #2. (b) The total resistance of wire #1 is equal to that of wire #2. ( The total resistance of wire #1 is half that of wire #2. (d) The total resistance of wire #1 is four times...
Calculate the ratio of the resistance of 10.0 m of aluminum wire 2.2 mm in diameter, to 24.0 m of copper wire 1.8 mm in diameter.
A copper wire has a circular cross section with a radius of 2.51 mm. (a) If the wire carries a current of 3.93 A, find the drift speed (in m/s) of electrons in the wire. (Take the density of mobile charge carriers in copper to be n = 1.10 ✕ 10^29 electrons/m^3.) m/s (b) For the same wire size and current, find the drift speed (in m/s) of electrons if the wire is made of aluminum with n = 2.11...
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
A 24 V battery with an internal resistance r of 0.15 Ohm is connected across two wires as shown below. The first wire is made of copper, has a radius of 1.5 mm, and is 2000 m long. The second wire has the same radius and length as the copper wire but is made of aluminium. Both wires are wrapped around a cylindrical plastic core (like a solenoid). a. What is the equivalent resistance of the entire circuit? b. What...