A cylindrical aluminum pipe of length 1.42 m has an inner radiusof 1.60 ×10-3 m and an outer radius of 3.39×10-3 m. The interior of the pipe is completely filledwith copper. What is the resistance of this unit? (Hint:Imagine that the pipe is connected between the terminals of abattery and decide whether the aluminum and copper parts of thepipe are in series or in parallel.)
