(Answered) A the magnetic field inside an air-filled solenoid

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A) The magnetic field inside an air-filled solenoid 36.5 cm long and 2.80 cm in diameter is 0.860 T. Approximately how much energy is stored in this field?

B) An LRC circuit has L = 3.73 mH and R = 2.04 kΩ What value must C have to produce resonance at 40.0 kHz? What will be the maximum current at resonance if the peak external voltage is 104 V

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