Undergraduate experiments on electromagnetism S.A.S. Rodrigues, C.I.S. Alves, A.C.C.C. Amorin, M. J. M. Gomes, M. Pereira, M.S.V. Machado, HSCI´ 2006, 3rd International Conference on Hands-on Science, Science Education and Sustainable Development, 4th - 9th September, 2006. Universidade do Minho, Braga, Portugal.