STUDY GUIDE 6, SELF TEST 3

© Department of Physics, University of Guelph.

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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 B?

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