Starting from roughly zero, I'd recommend this page and its neighbours: http://info.ee.surrey.ac.uk/Workshop/advice/coils/force.html http://info.ee.surrey.ac.u

Starting from roughly zero, I'd recommend this page and its neighbours: http://info.ee.surrey.ac.uk/Workshop/advice/coils/force.html http://info.ee.surrey.ac.uk/Workshop/advice/coils/force.html