The space between two metallic coaxial cylinders of length L=0.45 m and radii a=1.3 cm and b=2.3 cm is completely filled with a material having a resistivity ρ=21 Ω⋅m. The figure below shows a cross section of the configuration. A) What is the resistance between the two cylinders? Give your answer with a unit of "ohm" (lower case o). For my answer I got 8355.63 ohm which was wrong. b) Find the current between the two cylinders if a potential difference of 18 Volts is maintained between the two cylinders. for my answer I got .00215 A which was wrong.

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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.