a sheet of copper is 2mm thick and has surface dimensions of 8.0 cm by 24 cm . if the long edges are joined to form a tube 24 cm in length, what is the resistance between the ends?
The cross section is 8*.02.16 cm^2. From the wire table this is 2 #28 wires in parallel with (.213 ohms/m)/2 /.1065ohms/m. .1065*.24 .02556 ohms. Rolling it into a tube does nothing.
rho for copper is 1.68 x 10^-8 ohm m. R rho L / A R 1.68x10^-8 ohm m * 0.24m / (1.6x10^-4m^2) R 2.52x10^-5 ohm.
The cross section is 8*.02.16 cm^2. From the wire table this is 2 #28 wires in parallel with (.213 ohms/m)/2 /.1065ohms/m. .1065*.24 .02556 ohms. Rolling it into a tube does nothing.
rho for copper is 1.68 x 10^-8 ohm m. R rho L / A R 1.68x10^-8 ohm m * 0.24m / (1.6x10^-4m^2) R 2.52x10^-5 ohm.
