© Department of Physics, University of Guelph.
Click on the problem number you wish.
1. In 2.0 seconds, 1012 H+ ions flow through a capillary tube 1.0 mm in diameter. Calculate the current and the current density.
2. A current of 10.0 mA flowing through (along) your finger is painful. Suppose the current is carried by singly ionized atoms. How many ions per second are flowing? (1 mA = 10-3 A)
3. Currents and current paths are shown in the
diagram below. What are the currents and their directions in paths A and
Return to Study Guide 8