The resistance of gold is 2.8 ×
? at a temperature of 20°C. A gold wire, 1.8 mm in diameter and 14
cm long, carries a current of 600 mA. The power dissipated in the
wire is closest to:
A) 33 mW
B) 1.0 mW
C) 1.7 mW
D) 1.8 mW
E) 55 mW
Power dissipited in the wire
P=I2R
Given I=600mA=0.6A
R=2.8 × Ω
P=0.62*2.8*10-3=1*10-3W= 1mW
The resistance of gold is 2.8 × ? at a temperature of 20°C. A gold wire,...
The resistivity of gold is 2.44 x 10-80 mat a temperature of 20°C. A gold wire, 1.8 mm in diameter and 14 cm long, has a current of 480 mA flowing through it. What is the power converted in this wire at 20°C? 0.19 mW O 0.14 mW 0.077 mW 0.25 mW O 0.31 mW
11. The resistivity of gold is 2.H 10-50 mat room temperature. A gold wire that is 0.9 mm in diameter and 14 cm long carries a current of 940 mA. What is the electric field in the wire? hwina n of 4.00.600 and 100 are connected in parallel. If the combination is
The resistivity of gold is 2.44 x 10-8 ohms.m at room temperature. A gold wire that is 0.9 mm in diameter and 14 cm long carries a current of 940 mA. What is the electric field in the wire? Answer 0.090 V/m 0.028 V/m 0.046 V/m 0.0090 V/m 0.036 V/m
Calculate the resistance of a piece of gold wire that is 1.4 m long and has a diameter of 2.8 mm.
1) The density of free electrons in gold is 5.90 x 1028 m-3. The resistivity of gold is 2.44* x 10-80 m at a temperature of 20°C and the temperature coefficient of resistivity is 0.004 (°C)-1. A gold wire, 1.1 mm in diameter and 26 cm long, carries a current of 760 ma. The drift velocity of the electrons in the wire is closest to: A) 1.1 x 10-4 m/s B) 8.5 x 10-5 m/s 09 9.7 x 10-5 m/s...
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3. The resistivity of gold is 2.44 x10^-8 ohm.m at room temperature. A gold wire that is 0.9 mm in diameter and 14 cm long carries a current of 940 mA. What is the electric field in the wire9 A) 0.036 V/m B) 0.0090 V/m C) 0.028 V/m D) 0.046 V/m E) 0.090 V/m
What is the resistance of gold wire at 150°C , if it is 25.0 m long with a 0.100 mm diameter and has a resistance of 77.7 Ω at 20.0°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 iron 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 copper section of wire?
Learning Goal: Examine the dependence of resistivity and resistance of a wire on temperature and how it affects the potential difference across the terminals of the wire. Introduction: A current of 65 milli-amperes (mA) flows through a wire of length L= 1.7 meters long and diameter of d= 1.15 millimeters at a temperature of T0= 20 °C; the wire's resistivity at this temperature is ρ0= 5.33×10−8 Ω ∙ m. The temperature coefficient of resistivity of the material is α= 4.6×10−3/C°....