1. The problem statement, all variables and given/known data You have 12m of 0.50mm diameter copper wire and a power supply capable of passing 17A through the wire. a)What magnetic field strength would you obtain inside a 2.0cm diameter solenoid with the wire spaced as closely as possible? b)What magnetic field strength would you obtain at the center of a single circular loop made from the wire? 2. Relevant equations B=u0nI B=u0I/2r 3. The attempt at a solution a) n=pi*0.002=0.00628 or n=12/.00628=1909.86 not sure on this B=4pi*E-7nI B=1.34*1076T or B=4.08*10-2 b) B=4piE-7=17/(2*.001)=1.1-3T b is definitely wrong but I dont know why and I am completely unsure on a. all help appreciated.