A beam contains 84 x 108 doubly charged positiveions per
A beam contains 8.4 x 108 doubly charged positiveions per cubic centimeter, all of which are moving north with aspeed of 4.2 x 105 m/s. What is the magnitude of the current density?
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a beam contains 84 x 108 doubly charged positiveions per cubic centimeter all of which are moving north with aspeed of
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