A hollow copper tube of 10 m length has an external diameter

Last updated: 6/27/2023

A hollow copper tube of 10 m length has an external diameter of 20 cm and its walls are 10 mm thick Th specific resistance of copper is 1 7 x 10 8 Q m The resistance of the copper tube is approximately O 5 6 x 10 30 O 5 55 10 50 O 2 8 10 Q 2 85 10 50