A long cylindrical solenoid has the following parameters: diameter =d and length =X self inductance =L. (A) Calculate the number of turns of wire along 1 centimeter of the length of the cylinder. (B) What current flows in the wire if the solenoid stores field energy equal to U ? Parameter values d=2.50 cm;X=26 cm; L=1.32mH;U=0.05 J; (inA)