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A very long solenoid with a circular cross section and radius r= 6.10 cm with n=...

A very long solenoid with a circular cross section and radius r= 6.10 cm with n= 1.50E+4 turns/m has a magnetic energy density uB= 6.20 mJ/m3.

A. What is the current in the solenoid?


B. What is the total energy stored in the solenoid if its length is 0.620 meters? (Neglect end effects.)

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