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