You would like to store 81 j of energy in the magnetic


You would like to store 8.1 J of energy in the magnetic field of a solenoid. The solenoid has 530 circular turns of diameter 7.2 cm distributed uniformly along its 28 cm length.  How much current is needed?  What is the magnitude of the magnetic field inside the solenoid?  What is the energy density (energy/volume) inside the solenoid?

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Physics: You would like to store 81 j of energy in the magnetic
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