(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.)
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 ✕ 10−8 | 3.4 ✕ 10−3 |
Aluminum | 2.82 ✕ 10−8 | 3.9 ✕ 10−3 |
Tungsten | 5.6 ✕ 10−8 | 4.5 ✕ 10−3 |
Iron | 10.0 ✕ 10−8 | 5.0 ✕ 10−3 |
Platinum | 11 ✕ 10−8 | 3.92 ✕ 10−3 |
Lead | 22 ✕ 10−8 | 3.9 ✕ 10−3 |
Nichromea | 150 ✕ 10−8 | 0.4 ✕ 10−3 |
Carbon | 3.5 ✕ 10−5 | −0.5 ✕ 10−3 |
Germanium | 0.46 | −48 ✕ 10−3 |
Silicon | 640 | −75 ✕ 10−3 |
Glass | 1010–1014 | |
Hard rubber | ≈1013 | |
Sulfur | 1015 | |
Quartz (fused) | 75 ✕ 1016 |
aA nickel–chromium alloy commonly used in heating elements.
A
(b) If the wire is heated to 40.0°C while the 7.0-V potential
difference is maintained, what is the resulting current in the
wire?
A
(a) A 34.1-m length of copper wire at 20.0°C has a radius of 0.31 mm. If...
A wire 50.0 m long 려nd 2.00 mm in diameter is connected to a source with potential difference of 9.11 V, and the current is found to be 5.72 A. Assume a temperature of 20°C and using the table below, identify the metal out of which the wire is mad Resistivities and Temperature Coefficients of Resistivity for Various Materials (at 20°c) Material Resistivity Temperature Coefficient (Q m)of Resistivity (°c)-1 -3 1.59× 10 3.8 x 10 1.7 x 10-8 2.44 x...
(a) A 35.3-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 this table.) 1.48 A (b) If the wire is heated to 40.0°C while the 7.0-V potential difference is maintained, what is the resulting current in the wire?
A gold wire is 4.5 m long and 0.45 mm in diameter. What is its
resistance?
(The sheet from my professor.)
TABLE 21-1 Resistivities Substance Insulators Quartz (fused) Rubber Glass Semiconductors Silicon* Germanium* Conductors Lead Iron Tungsten Aluminum Gold Copper Copper, annealed Silver Resistivity, p (2 m) 7.5 × 1017 1 to 100 x 1013 1 to 10,000 x 109 0.10 to 60 0.001 to 0.5 22 × 10-8 9.71 × 10-8 5.6 x 10-8 2.65 × 10-8 2.20 x...
a.) A 33.9-m length of copper wire at 20.0°C has a radius of 0.31 mm. If a potential difference of 7.00 V is applied across the length of the wire, determine the current in the wire. b.) If the wire is heated to 40.0°C while the 7.00-V potential difference is maintained, what is the resulting current in the wire?
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...
хс Remaining Time: 09 minutes. 53 seconds Question completion Status What is the resistance of an Aluminum transmission line of length 3 km that has a cross sectional area of 3.14x10 *m? at temperature of 30°C Table 18.1 Resistivities and Temperature Coefficients at 20°C ρ (Ω-m) Conductors Silver Copper Gold wse the data in the table below Aluminum Tungsten Iron Lead Platinum Manganin Constantan Mercury Nichrome 1.59 x 10-* 1.67 x 10 2.35 x 10- 2.65 x 10- 5.40 x...
3. a) A tungsten wire of length 20.0 m, initially at temperature 20.0°C, has a diameter of 2.00 mm. The potential difference across the whole wire is 180 V. Determine the current intensity in the wire b) Due to ohmic losses, the wire is heated up to 60.0°C, but the potential difference through the wire remains the same. Find the resulting current intensity. Note: po = 5,6x10 82 m, a=4.5x10(°C)
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
problem
A wire 4.00 m long and 6.00 mm in diameter has a resistance of 15.0 m2. A potential difference of 22.0 v is applied between the ends Resistivity, p Temperature Coefficient of Resistivity, a(K-1) Material (2 m) Typical Metals 41 x 10-3 Silver 1.62 x 10 43 x 10-3 1.69 x 10 Copper 40 x 10-3 2.35 x 10-8 Gold 4.4 x 10 2.75 x 10 Aluminum 4.82 x 10-s 0.002 x 10-3 Manganin 4.5 x 10-3 5.25 x...
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.