A beam contains 2.0 $ 108 doubly charged positive ions per
Chapter , Problem 5(choose chapter or problem)
A beam contains 2.0 $ 108 doubly charged positive ions per cubic centimeter, all of which are moving north with a speed of 1.0 $ 105 m/s.What are the (a) magnitude and (b) direction of the current density (c) What additional quantity do you need to calculate the total current i in this ion beam?
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