Posted: March 2nd, 2017

A 12-V battery is connected across the free ends of the copper–iron rod. What is the voltage between the ends of the copper rod?

1. Two cylindrical rods, one copper and the other iron, are identical in lengths and cross-sectional areas. They are joined end to end to form one long rod. A 12-V battery is connected across the free ends of the copper–iron rod. What is the voltage between the ends of the copper rod?

2.The circuit in the drawing is known as a Wheatstone bridge circuit. Find the voltage between points B and D, and state which point is at the higher potential. (See image at the attached file)