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Ch.2 Problem 21.42 31 of 32> Part A Constants Calculate the magnetic field in the solenoid A solenoid 29.0 cm long and with a cross-sectional area of 0.570 cm2 contains 400 turns of wire and carries a current of 70.0 A Submit Request Answer Part B Calculate the energy density in the magnetic field if the solenoid is filled with air. J/m

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Date: Page No 2 29 mm 界 1319 3 그。 く87-energy densit 2 Mo (0°/21产 = u =0.03631

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