Two cylindrical bars, each with diameter of 2.40 cm, are welded together end-to-end. One of the original bars is copper and is 0.380 m long. The other bar is nichrome and is 0.195 m long. What is the resistance between the ends of the welded bar at 20 deg C ? I‘ve tried looking on here for help, but am not able to find the correct answer! I am using specific resistance for nichrome (1.08e-6) and copper (1.7e-8).
R p L / A where p is the resistivity, L is the length and A is the area Figure out R for each piece of the bar and add the results together. Be sure to use the same units of length as in the resistivity number (either ohm-m or ohm-cm)
