1. The problem statement, all variables and given/known data The figure below shows a Helmholtz coil used to generate uniform magnetic fields. Suppose the Helmholtz coil consists of two sets of coaxial wire loops with 17 turns of radius R = 76.6 cm, which are separated by R, and each coil carries a current of 0.131 A flowing in the same direction. Calculate the magnitude and the direction of magnetic field in the center between the coils. http://www.webassign.net/bauerphys1/28-figure-18a.gif 2. Relevant equations Isn't this a simple solonoid? So can't you just plug in the numbers and get the answers? Or does the multiple connections change the problem? B = u_0*i*n n = N/L 3. The attempt at a solution B= (4*pi*10^-7)*0.131*n It says r is equal to the length. so, n = N/L = 17/0.766 B= (4*pi*10^-7)*0.131*17/0.766 B = 3.653*10^-6 T, but this is wrong. Can anyone point me in the right direction?