The length and diameter of an aluminum wire is twice the length and diameter of a copper wire, respectively. Find the ratio of the resistances of the two wires.

Q: Consider an aluminum wire of diameter 0.700 mm and length 20.0 m. The resistivity of aluminum at…

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Q: (a) A lightbulb has a resistance of 220 2 when operating with a potential difference of 115 V across…

A: The given conditions in the problem are:  A lightbulb has a resistance of 220 Ω. The lightbulb…

Q: When 129 V is applied across a wire that is 8.5 m long and has a 0.30 mm radius, the magnitude of…

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Q: Two platinum wires (E & F) are found in a closet. Wire E has a resistance of RE. Wire F is 3 times…

A: The resistance of the wire E is .Wire F is 3 times shorter than wire E.The cross-sectional area of…

Q: A wire of length L and cross-sectional area A has resistance R. What will be the resistance…

A: A wire has length L, cross sectional area A and resistance R. Then resistance of the wire is given…

Q: (a) A lightbulb has a resistance of 150 2 when operating with a potential difference of 165 V across…

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Q: A lightbulb has a resistance of 280 N when operating with a potential difference of 80 V across it.…

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Q: (a) A 33.9-m length of copper wire at 20.0°C has a radius of 0.27 mm. If a potential difference of…

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Q: Current, Resistance, & EMF: 17. A copper wire of 3.2 mm in diameter and 4 m length carries a certain…

A: Given: d=3.2×10-3m, L=4m, R=75Ω, E=11V, r=0.8Ω (a) The resistivity of copper is known to be :…

Q: A certain material used for a wire is 25 m long and has a diameter of 3.0 mm. The wire carries a…

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Q: A common flashlight bulb is rated at 0.37 A and 2.2 V (the values of the current and voltage under…

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Q: A 30.0 m long extension cord is made from two #19 gauge copper wires. (a) What is the resistance of…

A: L = 30 m  diameter  d = 0.912 mm  resistance

Q: A thin silver wire has a resistance of 0.5 ohms when its temperature(in K) is To. The wire is then…

A: Temperature coefficient of silver = 0.0038 °C-1

Q: The Nichrome unit (p=660) in a toaster has a resistance of 24 ohms. What is the resistance of a…

A: resistance of nichrome unit (R) = 24 ohm Let the cross sectional area of nichrome unit = A Let the…

Q: vires are made of copper, but have different diameters. If the resistance of wire A is 27 Q/m and…

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Q: (a) A lightbulb has a resistance of 250 when operating with a potential difference of 115 V across…

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Q: The resistance of a copper wire at 20 degrees is 40Ω. The length of an aluminum wire is 6 times the…

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Q: copper wire 1mm in diameter and L m long has a resistance of 0.5 ohm. Find the resistance of another…

A: Given values:- Diameter of copper wire,(d)=1 mm=1 x 10-3 m ----(1) Length of copper wire,(l)=L m…

Q: (a) A lightbulb has a resistance of 230 N when operating with a potential difference of 140 V across…

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Q: (a) The cylinders A-D shown below are all made from copper. Rank them in order of increasing…

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Q: A hollow conducting cylinder has a length,and inner and outer radii . It is made of a material with…

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Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting material, its cross-sectional area, resistivity, and temperature.