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Part A A hollow copper wire with an inner diameter of 0 90 mm and an outer diameter of 1.9 mm carries a current of

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Part A A hollow copper wire with an inner diameter of 0 90 mm and an outer diameter of 1.9 mm carries a current of 90 A What is the current density in the wire? Express your answer with the appropriate units. View Available Hint(s) HA O Value Units Submit Provide Feedback 4

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