Assume the tungsten alloy has exactly twice the resistivity of aluminum. Rank the wires in order of decreasing resistance. Use  ">" or "=" symbols. (a) diameter 4 mm, length 4 m, aluminum (b) diameter 4 mm, length 2 m, tungsten alloy (c) diameter 2 mm, length 1 m, tungsten alloy (d) diameter 2 mm, length 1 m, aluminum (e) diameter 1 mm, length 1 m, aluminum (f) diameter 2 mm, length 2 m, tungsten alloy

Determine the length (in mm) of a gold conductor that has a resistance of 0.019 Ω and a cross-sectional area of 2.1 x 10-9 m2.  The resistivity of gold is 2.2 x 10-8 Ω-m [round your final answer to one decimal place].  An aluminum conductor with the same length and area as in Question above would have a higher resistance than the gold conductor.  The resistivity of aluminum is 2.6 x 10-8 Ω-m. True or false

Aluminum and copper wires of equal length are found to have the same resistance. What is the ratio of their radii? Note: You need to use the concept of resistivity and find the resistivity of these two materials to solve this problem. You can find a table of resistivity in your textbook or use the internet.

In the circuit shown in the diagram below, two thick wires connect a 1.7 volt battery to a Nichrome (NiCr) wire. Each thick connecting wire is 17 cm long, and has a radius of 11 mm. The thick wires are made of copper, which has 8.36e+28 mobile electrons per cubic meter, and an electron mobility of 0.00434 (m/s)/(V/m). The Nichrome wire is 8 cm long, and has a radius of 2 mm. Nichrome has 9e+28 mobile electrons per cubic meter, and an electron mobility of 7e-05 (m/s)/(V/m). [Copper What is the magnitude of the electric field in the thick copper wire? ]V/m What is the magnitude of the electric field in the thin Nichrome wire? v/m Nichrome Copper