An LC circuit has zero resistance, no battery, a capacitor C=70microFarads, and an inductor L=0.6H connected in a simple loop. The capacitor and inductor store a compined total energy of U=52microJoules.
(a) If the inductor is a cylindrical solenoid of length l=11centimeters and radius r=2.8centimeters, find the number of coils in the solenoid.
__ coils
(b) What is the maximum magnetic field inside the inductor?
___ mT