#5. (20 points) A tightly wrapped long air-filled solenoid has cross-sectional area A = 19.625 cm and contains N = 2800 turns of wire in its length l = 21.7 cm. (Take n 3.14) (a) (5 points) Calculate the value for its inductance L. When the current flowing through the solenoid is 1 = 1.5 A, calculate; (b) (5 points) the magnetic field inside the solenoid? (c) (5 points) the magnetic flux passing through the solenoid? (d) (5 points) the stored energy in the solenoid?