A beam contains 30 x 106 doubly charged positive ionsper
A beam contains 3.0 x 106 doubly charged positive ionsper cubic centimeter, all of which are moving north with a speed of5.4 x 105 m/s. What is the magnitude of the currentdensity?
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a beam contains 30 x 106 doubly charged positive ionsper cubic centimeter all of which are moving north with a speed
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