The resistance of a certain copper power line is 100 Ω at 20°C. What is the...
The resistance of a certain copper power line is 100 Ω at 20°C. What is the resistance when the sun heats up the line to 38°C? The inferred absolute temperature “Ti” of copper is -234.5°C.
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The resistance of a certain copper power line is 100 Ω at 20°C.
What is the...
The resistance of a certain copper power line is 100 Ω at 20°C. What is the resistance when the sun heats up the line to...
The resistance of a certain copper power line is 100 Ω at 20°C. What is the resistance when the sun heats up the line to 38°C? The inferred absolute temperature “Ti” of copper is -234.5°C.
An aluminum power transmission line has a resistance of 0.0580 Ω / km . a) What...
An aluminum power transmission line has a resistance of 0.0580 Ω / km . a) What is its mass per kilometer? (b) What is the mass per kilometer of a copper line having the same resistance? c)A lower resistance would shorten the heating time. Discuss the practical limits to speeding the heating by lowering the resistance.
(1 point) 8. At 20°C, a length of copper wire has a resistance of 5.0 Ω...
(1 point) 8. At 20°C, a length of copper wire has a resistance of 5.0 Ω What is its resistance when the wire is heated to 80°C? Let α-0.004 at 20°C 01.2Ω 07.5 Ω 06.2 Ω 010 Ω
A copper wire has a resistance of 0.500 Ω at 20.0°C, and an iron wire has...
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.
A 100-W lightbulb has a resistance of about 12 Ω when cold (20 ∘C) and 152...
A 100-W lightbulb has a resistance of about 12 Ω when cold (20 ∘C) and 152 Ω when on (hot). Estimate the temperature of the filament when hot assuming an average temperature coefficient of resistivity α=0.0045(C)−1.
A 100-W lightbulb has a resistance of about 12 Ω when cold (20 ∘C) and 124...
A 100-W lightbulb has a resistance of about 12 Ω when cold (20 ∘C) and 124 Ω when on (hot). Estimate the temperature of the filament when hot assuming an average temperature coefficient of resistivity α=0.0045(C)−1.
A 100-W lightbulb has a resistance of about 12 Ω when cold (20 ∘C) and 128...
A 100-W lightbulb has a resistance of about 12 Ω when cold (20 ∘C) and 128 Ω when on (hot). Estimate the temperature of the filament when hot assuming an average temperature coefficient of resistivity α=0.0045(C)−1.
A 100-W lightbulb has a resistance of about 12 Ω when cold (20 ∘C) and 128...
A 100-W lightbulb has a resistance of about 12 Ω when cold (20 ∘C) and 128 Ω when on (hot). Estimate the temperature of the filament when hot assuming an average temperature coefficient of resistivity α=0.0045(C)−1.
A 100-W lightbulb has a resistance of about 12 Ω when cold (20 ∘C) and 128...
A 100-W lightbulb has a resistance of about 12 Ω when cold (20 ∘C) and 128 Ω when on (hot). Estimate the temperature of the filament when hot assuming an average temperature coefficient of resistivity α=0.0045(C)−1. Express your answer to two significant figures and include the appropriate units.
The resistance of a 50 m long copper wire is 0.267 Ω at 20 °C. Calculate...
The resistance of a 50 m long copper wire is 0.267 Ω at 20 °C. Calculate the diameter of the wire. The resistivity of copper is 1.68 x 10-8 Ωm.
(1 point) 8. At 20°C, a length of copper wire has a resistance of 5.0 Ω What is its resistance when the wire is heated to 80°C? Let α-0.004 at 20°C 01.2Ω 07.5 Ω 06.2 Ω 010 Ω
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